In chemistry, an electrolyte is any substance containing free ions that make the substance electrically conductive. The most typical electrolyte is an ionic solution, but molten electrolytes and solid electrolytes are also possible.

Commonly, electrolytes are solutions of acids, bases or salts. Furthermore, some gases may act as electrolytes under conditions of high temperature or low pressure. Electrolyte solutions can also result from the dissolution of some biological (e.g., DNA, polypeptides) and synthetic polymers (e.g., polystyrene sulfonate), termed polyelectrolytes, which contain charged functional groups.

Electrolyte solutions are normally formed when a salt is placed into a solvent such as water and the individual components dissociate due to the thermodynamic interactions between solvent and solute molecules, in a process called solvation. For example, when table salt, NaCl, is placed in water, the salt (a solid) dissolves into its component ions, according to the dissociation reaction :NaCl_(s) → Na⁺_(aq) + Cl⁻_(aq) It is also possible for substances to react with water producing ions, e.g., carbon dioxide gas dissolves in water to produce a solution which contains hydronium, carbonate, and hydrogen carbonate ions.

Note that molten salts can be electrolytes as well. For instance, when sodium chloride is molten, the liquid conducts electricity.

An electrolyte in a solution may be described as concentrated if it has a high concentration of ions, or dilute if it has a low concentration. If a high proportion of the solute dissociates to form free ions, the electrolyte is strong; if most of the solute does not dissociate, the electrolyte is weak. The properties of electrolytes may be exploited using electrolysis to extract constituent elements and compounds contained within the solution.

Physiological importance

In physiology, the primary ions of electrolytes are sodium (Na⁺), potassium (K⁺), calcium (Ca²⁺), magnesium (Mg²⁺), chloride (Cl⁻), hydrogen phosphate (HPO₄²⁻), and hydrogen carbonate (HCO₃⁻). The electric charge symbols of plus (+) and minus (−) indicate that the substance in question is ionic in nature and has an imbalanced distribution of electrons, the result of chemical dissociation.

All known higher lifeforms require a subtle and complex electrolyte balance between the intracellular and extracellular milieu. In particular, the maintenance of precise osmotic gradients of electrolytes is important. Such gradients affect and regulate the hydration of the body as well as blood pH, and are critical for nerve and muscle function. Various mechanisms exist in living species that keep the concentrations of different electrolytes under tight control.

Both muscle tissue and neurons are considered electric tissues of the body. Muscles and neurons are activated by electrolyte activity between the extracellular fluid or interstitial fluid, and intracellular fluid. Electrolytes may enter or leave the cell membrane through specialized protein structures embedded in the plasma membrane called ion channels. For example, muscle contraction is dependent upon the presence of calcium (Ca²⁺), sodium (Na⁺), and potassium (K⁺). Without sufficient levels of these key electrolytes, muscle weakness or severe muscle contractions may occur.

Electrolyte balance is maintained by oral, or in emergencies, intravenous (IV) intake of electrolyte-containing substances, and is regulated by hormones, generally with the kidneys flushing out excess levels. In humans, electrolyte homeostasis is regulated by hormones such as antidiuretic hormone, aldosterone and parathyroid hormone. Serious electrolyte disturbances, such as dehydration and overhydration, may lead to cardiac and neurological complications and, unless they are rapidly resolved, will result in a medical emergency.

Measurement

Measurement of electrolytes is a commonly performed diagnostic procedure, performed via blood testing with ion selective electrodes or urinalysis by medical technologists. The interpretation of these values is somewhat meaningless without analysis of the clinical history and is often impossible without parallel measurement of renal function. Electrolytes measured most often are sodium and potassium. Chloride levels are rarely measured except for arterial blood gas interpretation since they are inherently linked to sodium levels. One important test conducted on urine is the specific gravity test to determine the occurrence of electrolyte imbalance.

Rehydration

In oral rehydration therapy, electrolyte drinks containing sodium and potassium salts replenish the body's water and electrolyte levels after dehydration caused by exercise, excessive alcohol consumption, diaphoresis, diarrhea, vomiting, intoxication or starvation. Athletes exercising in extreme conditions (for three or more hours continuously e.g. marathon or triathlon) who do not consume electrolytes risk dehydration (or hyponatremia).

A simple electrolyte drink can be home-made by using the correct proportions of water, sugar, salt, salt substitute for potassium, and baking soda.

Electrolytes are commonly found in fruit juices, coconut water, sports drinks, milk, and many fruits and vegetables (whole or in juice form) (e.g. potatoes, avocados).

Electrochemistry

When electrodes are placed in an electrolyte and a voltage is applied, the electrolyte will conduct electricity. Lone electrons normally cannot pass through the electrolyte; instead, a chemical reaction occurs at the cathode consuming electrons from the anode. Another reaction occurs at the anode, producing electrons that are eventually transferred to the cathode. As a result, a negative charge cloud develops in the electrolyte around the cathode, and a positive charge develops around the anode. The ions in the electrolyte neutralize these charges, enabling the electrons to keep flowing and the reactions to continue.

For example, in a solution of ordinary table salt (sodium chloride, NaCl) in water, the cathode reaction will be :2H₂O + 2e⁻ → 2OH⁻ + H₂ and hydrogen gas will bubble up; the anode reaction is :2NaCl → 2 Na⁺ + Cl₂ + 2e⁻ and chlorine gas will be liberated. The positively charged sodium ions Na⁺ will react towards the cathode neutralizing the negative charge of OH⁻ there, and the negatively charged hydroxide ions OH⁻ will react towards the anode neutralizing the positive charge of Na⁺ there. Without the ions from the electrolyte, the charges around the electrode would slow down continued electron flow; diffusion of H⁺ and OH⁻ through water to the other electrode takes longer than movement of the much more prevalent salt ions.

Also: Electrolytes dissociate in water because water molecules are dipoles and the dipoles orient in an energetically favorable manner to solvate the ions.

In other systems, the electrode reactions can involve the metals of the electrodes as well as the ions of the electrolyte.

Electrolytic conductors are used in electronic devices where the chemical reaction at a metal/electrolyte interface yields useful effects.

In batteries, two metals with different electron affinities are used as electrodes; electrons flow from one electrode to the other outside of the battery, while inside the battery the circuit is closed by the electrolyte's ions. Here the electrode reactions convert chemical energy to electrical energy.

In some fuel cells, a solid electrolyte or proton conductor connects the plates electrically while keeping the hydrogen and oxygen fuel gases separated.

In electroplating tanks, the electrolyte simultaneously deposits metal onto the object to be plated, and electrically connects that object in the circuit.

In operation-hours gauges, two thin columns of mercury are separated by a small electrolyte-filled gap, and, as charge is passed through the device, the metal dissolves on one side and plates out on the other, causing the visible gap to slowly move along.

In electrolytic capacitors the chemical effect is used to produce an extremely thin 'dielectric' or insulating coating, while the electrolyte layer behaves as one capacitor plate.

In some hygrometers the humidity of air is sensed by measuring the conductivity of a nearly dry electrolyte.

Hot, softened glass is an electrolytic conductor, and some glass manufacturers keep the glass molten by passing a large current through it.

Dry electrolyte

Dry electrolytes are essentially gels in a flexible lattice framework.

See also

Strong electrolyte

ITIES (Interface between Two Immiscible Electrolyte Solutions)

References

Category:Electrochemistry Category:Blood tests Category:Urine tests Category:Physical chemistry Category:Acid-base physiology Category:Electrical conductors

ar:كهرل bs:Elektrolit bg:Електролит ca:Electròlit cs:Elektrolyt da:Elektrolyt de:Elektrolyt dv:ކަރައިވަރު et:Elektrolüüt el:Ηλεκτρολύτης es:Electrolito eo:Elektrolito fa:الکترولیت fr:Électrolyte ko:전해질 hi:विद्युत अपघट्य hr:Elektrolit io:Elektrolito id:Elektrolit is:Raflausn it:Elettrolita he:אלקטרוליט kk:Электролит ht:Elektwolit lv:Elektrolīts lt:Elektrolitas hu:Elektrolit mk:Електролит ms:Elektrolit nl:Elektrolyt ja:電解液 no:Elektrolytt pl:Elektrolit pt:Eletrólito ro:Electrolit ru:Электролит simple:Electrolyte sk:Elektrolyt sl:Elektrolit sr:Електролит sh:Elektrolit fi:Elektrolyytti sv:Elektrolyt th:อิเล็กโทรไลต์ tr:Elektrolit uk:Електроліти zh:电解质

Coordinates	38°37′38″N90°11′52″N
name	The Basics
background	group_or_band
origin	Melbourne, Australia
genre	Rock
years active	2002 – (present)
label	Independent, Albert Records
associated acts	Gotye, Down Hills Home, Dog With Wheels, Blood Red Bird
website	The Basics Official Website
current members	Wally De BackerTim HeathKris Schroeder
past members	Michael Hubbard
notable instruments	Lead guitar, drums, bass guitar. }}

The Basics ( ) are a three-piece band from Melbourne, Australia, formed by Wally De Backer and Kris Schroeder in 2002. Their style has been described as anything from 'indie-pop' to 'rock'n'roll' to 'pop-rock', though their records show them span a wide range of genres including reggae, ska, country, and electro-pop. They are "recognised as one of Australia's hardest-working bands".

With close to 1000 shows in their nine-year career, their live performances are well-known for their sense of humour and energy.

Formation

The Basics were formed after Kris met Wally at a party in Melbourne. The event was to see off the young aspiring producer, who was about to depart for Los Angeles, and together with a number of musician friends, the two jammed on some blues-rock standards. Later that night, they bonded over a mutual love of The Beatles, 70s & 80s cartoon theme songs and old Sierra adventure games.

Initially they played around Melbourne as an acoustic guitar/drums combo, starting at The Opposition in Frankston and the House of Fools in Footscray, where in late 2002 they met and later invited Michael Hubbard to join them on electric guitar. Though lacking any real experience with the instrument, Kris willingly purchased his first bass guitar and the trio was born. During this time the group start performing songs with more complicated three-part harmony.

During late 2002 and early 2003 The Basics recorded and released an album called ''Get Back'' through MGM Distribution. They began what was to become regular tours of the East and West coasts of Australia.

2004-2005: Current lineup

Tim Heath joined the group in June 2004, after Michael decided to pursue his solo career, which has included being one half of Down Hills Home. Tim was reportedly the only person to reply to an advertisement in Melbourne's Beat Magazine looking for a new guitarist. Tim apparently answered the advertisement - which said the applicant "must have a love of 50s and 60s rock'n'roll" - thinking that he would be meeting "a couple of old guys to play with on the weekends over some beers". They soon recorded ''For Girls Like You''.

The Basics in 2005 continued to tour and play small festivals, and after releasing ''For Girls Like You'' through MGM Distribution they departed for a national tour of Australia, which lasted for two months and took them to every Australian state and territory. Stuart Padbury, a young Melbourne sound engineer, joined them on much of this tour. On returning, the band began demoing songs for a new album.

2006-2009: Touring and soundtracks

In 2006, The Basics began recording what is to become known as ''Stand Out/Fit In''. This took several months and was not completed until the end of the year, despite intentions to have it released in June. Instead, they held a successful 'album preview' where each of the tracks was demonstrated in 'rough form' accompanied by a music video for each (produced by Melbourne photographic artist James Bryans). The band also talked about the origins of the songs. This event brought a lot of attention to the band for the idea's originality. They pre-released a radio single 'Just Hold On' from the album. The band were invited to play the hugely popular Homebake Festival in Sydney, where they received a great response ("one of the highlights" wrote ''The Daily Telegraph'').

In 2007, the band departed on a tri-state residency which saw them play Melbourne, Sydney and Brisbane every week for the month of April - a bold move which brought further attention to the band for its original idea. Riding on the wave of this tour, Schroeder, De Backer and Heath departed on their first overseas tour which saw them performing 26 shows around Japan, Norway and the United Kingdom. They also toured twice more up the East Coast, one of which was with popular Japanese band The Bawdies. Their song 'Rattle My Chain' was used in a series of commercials for Volvo Australia. The song 'Hey There!' featured in the British film ''The Bank Job'' - starring Jason Statham - and was used as the backing for a February 2007 short film directed by Tim Longhurst called The Rip. Their song 'Better' was featured in a surfing documentary about the invention of the shortboard in 1967.

In 2008, the band appeared on Australia's Channel 9 for Australia Day celebrations, performing two of their songs - 'Just Hold On' and 'Hey There!' - to an estimated audience of 2 million. Securing an Australian Government grant, they embarked on a two-month tour of Australia, specifically targeting "culturally underprivileged groups" in rural and regional schoolchildren and Indigenous communities. The programme had them holding masterclasses and performing alongside Indigenous groups in the remote Northern Territory and Queensland. Their initiative also had them raising money for the charity Lifeline, their contribution to which was recognised with a plaque at the end of the tour. Season two of ''Californication'' starring David Duchovny featured their cover of the classic 'Have Love, Will Travel', most famously covered by 'The Sonics'.

In 2009, The Basics for the first time enjoyed the support of Australian radio network Triple J, which had reportedly snubbed the band's previous material. The singles 'With This Ship' and 'Like A Brother' were added to the station's playlist, and momentum carried The Basics overseas for a second tour of the United Kingdom and Norway, and also a series of shows in Dublin, Ireland. They were joined by the longtime front-of-house engineer Stuart Padbury who had been mixing them since 2005. The band was often seen in the Grafton Street Mall in Dublin busking to promote their concerts there. Their second show in Oslo, Norway saw the band perform with Hot Tub, one of the members of the Norwegian boy band "Boyzvoice", in his first performance for several years. Season Eight of ''Scrubs'' featured the song 'Lookin' Over My Shoulder'.

Despite all this promise, the band's album ''Keep Your Friends Close'' - produced and part-recorded by Peter Cobbin at London's Abbey Road Studios - though enjoying many favourable reviews, failed to impress Richard Kingsmill, music director of Triple J. This effectively ended the band's apparent upward spiral and the resulting album launch tour was reportedly "trying".

2010: Hiatus and live album

In 2010, following the band's fourth stint at the Tamworth Country Music Festival, and the recording of a yet-unreleased live album, an indefinite hiatus was announced on the band's websites. This was in part due to the impending release of a new album produced by Wally for his Gotye project, and also to reported tensions within the band following the previous year's disappointments.

However, this hiatus was soon broken with a two-month residency at the Northcote Social Club in Melbourne, which saw an apparent return to form. The band's EP "Wait For You" enjoys airplay on Triple J. The Basics also played a one-off show at Sydney's Oxford Art Factory.

On 20 August 2010, The Basics released their fourth LP , available free online and exclusively from *[www.FreeBasicsAlbum.com]. The band had reportedly moved to expand their listenership through this free giveaway, though 300 "Deluxe" CD/Vinyl versions have been printed. was recorded at the Northcote Social Club on 6 February, "in front of a live studio audience", and like the previous record was mixed by Peter Cobbin at Abbey Road Studios. Technically a self-titled album, the phonetics spell out the accurate pronunciation of the band’s name. Kris Schroeder: "For years we’ve worked at bringing our live energy into the studio and thus far it’s been a bit hit-and-miss. Our trick this time was to pull a switcheroo and bring the studio to us instead; the result is the best and closest to us we’ve sounded yet."

Melbourne thespian and Dog With Wheels bassist David Bramble - friends with Heath from university days - has occasionally joined the band on tour, playing keys, often while sporting a large moustache. Other guests have included Jake Mason (saxophone), also of Cookin' on 3 Burners and The Bamboos, Gideon Brazil (saxophone, flute), Simon Imrei (guitar and vocals) and Monty MacKenzie (saxophone).

Covers have often made an appearance from various sources: to date, some of the bands covered have been Cream, The Kinks, The Rolling Stones, The Police, Neil Young, Bob Dylan, New Kids on the Block, Richard Berry, Sonny Curtis and The Crickets, JJ Cale, Harry Nilsson, Bill Scott, Ryan Adams and The Coasters (via The Beatles for their cover of Three Cool Cats).

Members

Kris Schroeder: Bass, Vocals

Wally De Backer: Drums, Vocals

Tim Heath: Guitar, Vocals

Discography

Albums

Get Back (15 January 2004)

Stand Out/Fit In (5 May 2007)

Keep Your Friends Close (25 September 2009)

(20 August 2010)

EP

For Girls Like You (11 July 2005)

Lookin' Over My Shoulder (10 February 2007)

Like A Brother (5 June 2009)

Wait For You (21 May 2010)

Singles

Call It Rhythm & Blues (20 August 2004)

Just Hold On

With This Ship (22 February 2009)

Upcoming projects

The band are taking a two year hiatus, set to return to the stage together in early 2012. Wally De Backer will be launching a new album under his Gotye act in August 2011, Tim Heath will be touring and recording with Blood Red Bird, and Kris Schroeder is currently recording a solo album.

References

External links

Official Website

Myspace Website

Category:Victoria (Australia) musical groups