KVV E-Modules

How many mL of a 20% w/v solution are needed to prepare 100 mL of a 5% w/v solution?

A: 10ml B: 50ml C: 25ml D: 75ml

How much NaCl is required to prepare 500 mL of a 0.9% w/v sodium chloride solution?

A: 0.045gm B: 4.5gm C: 45gm D: 0.9gm

To prepare 250 mL of a 2% v/v solution from a stock solution of 10% v/v, how much of the …

A: 25ml B: 50ml C: 75ml D: 100ml

If 60 mL of a 25% v/v solution is diluted to 300 mL, what is the final percentage strength?

A: 15% B: 10% C: 5% D: 20%

How much distilled water should be added to 40 mL of a 12% w/v solution to reduce its strength to …

A: 40ml B: 60ml C: 120ml D: 80ml