A solution with a mass of 1.263g containing an unkown amount of potassium ions was treated with excess sodium tetraphenylborate to precipitate 1.003g of KB `(C_(6)H_(5))_(4)` (M = 358.33). What is the mass percentage of potassium in the original solution?

When 400 g of a 20% solution by weight was cooled, 50 g of solute precipitated. What is the percentage by mass of solute in the remaining solution ?

When 400 g of a 20% solution by weight was cooled, 50 g of solute precipitated. What is the percentage by mass of solute in the remaining solution ?

What is the mass of precipitate formed when 50 ml of 8.5% solution of AgNO_3 is mixed with 100ml of 1.865% potassium chloride solution ?

What will be the mass by mass percentage of a solution containing 30 g of common salt in 220 g of water?

3.6g mixture of sodium chloride and potassium chloride is dissolved in water. The solution is treated with excess of silver nitrate solution, 7.74g of silver chloride is obatined. Find the percentage of sodium chloride and potassium chloride in the mixture.