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 ▸explain why there is a decrease in first ionisation energy between elements phosphorus and sulfur
Explain why adding small amounts of acid or base hardly changes the pH of an acidic buffer solution.
State the trend in electronegativity for the elements of group 17 and explain why this trend occurs.
Explain why potassium has a greater first ionisation energy than rubidium.