Question

A student add 5 ml of water to 25 ml solution of 6 M HNO3 what will be the molarity of new solution​

Answer 1

Answer:

It does not matter which set of conditions is labelled 1 or 2, as long as the conditions are paired together properly. Using the dilution equation, we have

(2.19 M)(25.0 mL) = M2(72.8 mL)

Solving for the second concentration (noting that the milliliter units cancel),

M2 = 0.752 M

The concentration of the solution has decreased. In going from 25.0 mL to 72.8 mL, 72.8 − 25.0 = 47.8 mL of solvent must be added.

Test Yourself

A 0.885 M solution of KBr whose initial volume is 76.5 mL has more water added until its concentration is 0.500 M. What is the new volume of the solution?

Answer

135.4 mL