An automobile repair shop wants to mix a solution that is 35% pure antifreeze with another solution that is 75% pure antifreeze. How many liters of each solution must be used in other to produce 80 liters of solution that is 50% pure antifreeze?

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?

An exterminator needs to dilute a 25% solution of an insecticide with a 15% solution of the same insecticide. How many more liters of the 25% solution that the 15% solution are needed to make a total of 80 liters of a 22% solution of the insecticide?

An isotonic solution with produce an osmotic pressure of 10 atm measured against pure water at 37^(@)C . How many grams of NaCl must be dissolved in one litre of water to produce isotonic solution.

175 litres of a solution contains 88% of acid and the rest water. How many liters of water must be added such that the resulting mixture contains 23% of water ?

An isotonic solution will produce an osmotic pressure of 10.00 atm measured against pure water at 37^@C . How many grams of NaCl must be dissolved in one litre of water to produce at isotonic solution

A chemist has one solution which is 50% acid and another solution which is 25 % acid. How much each should be mixed to make 10 litres of a 40 % acid solution ? (Use Cramer's rule to solve the problem).