Question

Calculate the number of moles of hydrochloric acid present in 500 ml of 0.1 molar hydrochloric acid solution

Answer 1

Answer:

You can use this formula to find mole from molarity.

Mole = molarity x volume

Don’t forget to convert 500 mL to 0,5 L.

Then.

Mole = 2 M x 0,5 L = 1 mole

So, to prepare 500 mL HCl 2 M you need 1 mole HCl.

2 M HCl = 2 mol HCl in 1.0 L or 1000 mL solution

For 500 mL solution you require: 500 mL / 1000 mL * 2 mol = 1.0 mol HCl