How much pure alcohol be added to 400 ml of a 15% solution to make its strength 32%?

1.325 g of anhydrous sodium carbonate are dissolved in water and the solution made up to 250 mL. On titration, 25 mL of this solution neutralise 20 mL of a solution of sulphuric acid. How much water should be added to 450 mL of this acid solution to make it exactly N/12 ?

20 mL of a solution of H_2SO_4 neutralises 21.2 mL of 30% solution (w/v) of Na_2CO_3 . How much water should be added to each 100 mL of the solution to bring down its strength to decinormal ?

Calculate the volume of water to be added to 400 ml of seminormal HCl solution to make it decinormal

How much water should be added to 500 mL of N/2 NaOH solution to obtain a decinormal solution?

How much water is to be added to dilute 10 mL of 10 N HCl to make it decinormal?

Vapour pressure of water is 360 mm Hg, how much urea should be added to 200 mL water to reduce its vapour pressure by 0.5% (Molecular wt. of urea =60) (100)/(3)g)

How many liters of a 25% saline solution must be added to 3 liters of a 10% saline solution to obtain a 15% saline solution?

The specific gravity of a salt solution is 1.025. If V mL of water is added to 1 L of this solution to make its density 1.02 g mL^(-1) , what value of V in mL approxmately?

0 . 25 g lyophillic colloid is added to 100 ml gold solution to prevent the coagulation on adding 1 ml 10% NaCl Solution . What will be gold number of tyophilic colloid ?

How much NaNO_3 must be weighed out to make 50 ml of an aqueous solution containing 70 mg Na^(+) per ml?