Question

Which of the following is not a concentration unit (a) 1 molar (b) 1 equivalent (c) 1% by mass (d) 1 molal

Answer 1

Answer:

(b) 1 equivalent  

Step-by-step explanation:

Concentration is the relative amount of a substance in a given volume or mass of something else.

An equivalent is not a concentration, because it is just a mass —the mass of a substance needed to react with or supply one gram of hydrogen.

(a) is wrong. 1 M means that there is 1 mol of a substance in 1 L of solution.

(c) is wrong. 1 % by mass that there is 1 g of a substance in 100 g of the mixture.

(d) is wrong. 1 m means that there is 1 mol of a substance in 1 kg of solvent.