chemistry (solubility)

Question

Which of the following statements is true?

Question 10 options:

	An acid-base titration is a procedure in which we measure the volume of acid or base of known concentration to neutralize a given volume of base (or acid) of unknown concentration.
	In any neutralization reaction, equal volumes of acid and base are used.
	In any neutralization reaction, one mole of acid neutralizes one mole of base.
	Phenolphthalein is an acid-base indicator that is pink in the presence of excess acid and colourless in the presence of excess base.

Answer 1

An acid-base titration is a procedure in which we measure the volume of acid or base of known concentration to neutralize a given volume of base (or acid) of unknown concentration. TRUE

In any neutralization reaction, equal volumes of acid and base are used. FALSE

Because the volumes will depend on the concentrations and the stoichiometry.

In any neutralization reaction, one mole of acid neutralizes one mole of base. FALSE

Because it depends on the stoichiometry. For example it takes 2 moles HCl to neutralize 1 mol Ba(OH)₂

Phenolphthalein is an acid-base indicator that is pink in the presence of excess acid and colorless in the presence of excess base. FALSE

Because it is colorless in acid and pink in base