can anyone tell me about those materials?
2006-10-24 20:54:53 · 3 answers · asked by Maddie 7 in Education & Reference ➔ Primary & Secondary Education
acids are substances that have a pH of less than 7. Bases, also known as alkalis, have a pH of more than 7. The pH scale goes from 1 to 14 and is logarithmic (ie an acid of pH 3 is ten times more acidic than one of pH 4, 100 times more acidic than one of pH 5 etc) 7 is neutral.
Stuff like lemon juice, vinegar and sulphuric acid are acids. Borax is alkaline.
2006-10-24 20:59:33 · answer #1 · answered by Bheal 2 · 0⤊ 0⤋
* Compounds that gives H+ in solution are acids and giving OH- in solution are bases.
like: HCl, HNO3 (Monovalent : gives one mole H+ ion per mole acid)
H2SO4 : Bivalent
* Compunds having pH less than 7 are acids and more than 7 are bases.
Monovalen: NaOH (Bases of 1A grp compund from periodic table)
Bivalent: Ca(OH)2 (2A grp)
Trivalent : Al(OH)3 (3A grp)
Also:
Acid + Base = Salt + water
HCl + NaOH = NaOH + Water
2006-10-25 04:06:52 · answer #2 · answered by contactvikash716 1 · 0⤊ 0⤋
according to one definition (the arrhenius def), acids are proton (H+ ion) donors; bases are proton recipients..
2006-10-25 04:06:38 · answer #3 · answered by Jeffrey 1 · 0⤊ 0⤋