What is the difference between an acid and a base?
An acid when dissolved in a liquid, will produce hydrogen ions (H+) while a base will produce hydroxide ions (OH-). When a litmus paper is used to test acids and bases, acids turn the litmus paper red while bases turn the litmus paper blue. On the pH scale (1-14), acids have pH less than 7 while bases have pH greater than seven.
LS
Related Chemistry A Level answers
All answers ▸What is the difference between stereoisomerism and optical isomerism?
What does Le Chatelier's principle say happens to an equilibrium when temperature is changed or a catalyst is added?
Define ferromagnetism, paramagnetism and diamagnetism, and determine whether the following complexes a) AgCl b) [Fe(CN)6]4- c) [Mn(CN)6]4- d) Co(H2O)6Cl2 are ferromagnetic, diamagnetic or paramagnetic giving a full justification for your reasoning.
What is solvent leveling? How can we distinguish between two strongly acidic solutions? (This is a challenging question and is included for interest only)