2006-10-18 05:20:33 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Biology
An acid accepts an electron pair in a reaction, and a base donates an electron pair.
When measuring it on the pH scale, an acid is a substance with a pH below 7, and a base is a substance with a pH above 7. A substance with a pH of 7 is considered neutral.
2006-10-18 05:22:55 · answer #1 · answered by Anonymous · 2⤊ 0⤋
Difference Between Acid And Base
2016-09-28 23:22:39 · answer #2 · answered by ? 4 · 0⤊ 0⤋
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Acids are H+ donors and Bases are H+ acceptors in chemical processes. Example: HCl gives H+ in the solvent water to become H+ and Cl- and is an acid. This is only one of several definitions of acids and bases but in my opinion the easiest to understand. Also, acids have a pH below 7 and bases have a pH above 7. The pH means the molar concentration of [H+] ions, 1 pH meaning 1 * 10 ^ -1 moles of [H+] ions per liter and 2 pH meaning 1 * 10 ^ -2 moles per liter. So, each 1 decrease on the pH scale means 10 times more [H+] ions and each 1 increase means 10 times less [H+] ions. Glad to help.
2016-03-27 03:38:57 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Acid has a ph below 7 while base has a ph above 7
acid is made with a hydrogen ion combined to a metal or a polyatomic ion(e.g. CO3, SO4)
base is made with a hydroxide ion joining to a metal
acid turns blue litmus paper red while base turn red litmus paper blue
acid is colourless in phenolphthalein while base is pink in it.
2006-10-18 06:36:35 · answer #4 · answered by Fatima A 3 · 2⤊ 0⤋
This is definitely in your textbook somewhere.
Let's use the Bronsted definitions.
An acid is a proton donor. Examples include HCl, H2SO4 and HNO3.
A base is a proton acceptor/remover. Examples include OH, NH3 (ammonia), and CN (cyanide).
There is also the Lewis acid system. It is really the same thing said differently, and more general. Let's worry about that later.
2006-10-18 05:27:29 · answer #5 · answered by davisoldham 5 · 1⤊ 2⤋
Acids and bases are on completely different ends of the ph scale and they cancel each other out.
2006-10-18 05:24:10 · answer #6 · answered by Whitney 7 · 1⤊ 1⤋
The pH of < or > 7. Acids have an excess of H+ ions creating a low pH. Bases have excess of OH- ions creating a high pH.
2006-10-18 05:23:56 · answer #7 · answered by Reddy492 2 · 1⤊ 0⤋
Hydrogen ion concentration H+. Acids have more
2006-10-18 05:23:19 · answer #8 · answered by Anonymous · 1⤊ 0⤋
there are more than one definition of acid and base, but i'll stick with bronsted lowry.
acid - H donor
base - H acceptor
2006-10-18 07:17:08 · answer #9 · answered by shiara_blade 6 · 1⤊ 0⤋
Svante Arrhenius:
acids produce H+ ions in aqueous solutions
bases produce OH- ions in aqueous solutions
water required, so only allows for aqueous solutions
only protic acids are allowed; required to produce hydrogen ions
only hydroxide bases are allowed
Johannes Nicolaus Brønsted - Thomas Martin Lowry:
acids are proton donors
bases are proton acceptors
aqueous solutions are permissible
bases besides hydroxides are permissible
only protic acids are allowed
Gilbert Newton Lewis:
acids are electron pair acceptors
bases are electron pair donors
least restrictive of acid-base definitions :
Properties of Acids:
taste sour (don't taste them!)... the word 'acid' comes from the Latin acere, which means 'sour'
acids change litmus (a blue vegetable dye) from blue to red
their aqueous (water) solutions conduct electric current (are electrolytes)
react with bases to form salts and water
evolve hydrogen gas (H2) upon reaction with an active metal (such as alkali metals, alkaline earth metals, zinc, aluminum)
Properties of Bases:
taste bitter (don't taste them!)
feel slippery or soapy (don't arbitrarily touch them!)
bases don't change the color of litmus; they can turn red (acidified) litmus back to blue
their aqueous (water) solutions conduct and electric current (are electrolytes)
react with acids to form salts and water
Examples of Common Acids:
citric acid (from certain fruits and veggies, notably citrus fruits)
ascorbic acid (vitamin C, as from certain fruits)
vinegar (5% acetic acid)
carbonic acid (for carbonation of soft drinks)
lactic acid (in buttermilk)
Examples of Common Bases:
detergents
soap
lye (NaOH)
household ammonia (aqueous)
2006-10-18 05:30:33 · answer #10 · answered by Anonymous · 1⤊ 0⤋