Question

A student forgets to weigh a mixture of sodium bromide dihydrate and magnesium bromide hexahydrate. Upon strong heating, the sample loses 252.1 mg of water. The mixture of anhydrous salts reacts with excess AgNO₃ solution to form 6.00X10⁻³ mol of solid AgBr. Find the mass % of each compound in the original mixture.

Answer 1

The mass percent of each compound is

• (NaBr*2H2O)=85.71 percent
• (MgBr2*6H2O)=14.29 percent

The mass percent equation is as follows.

The formula mass percent is the most effective way to express mass percent: mass percent = (mass of chemical x total mass of compound) times 100. Add 100 to the top value to get the value expressed as a percentage.

What percentage by mass does a solution have?

By multiply the grams of solute per gram of solution by 100, it is possible to get the mass percent of a solution.

The molar mass of each element and the mass of each element contained in a mole of the compound are both solved for in the Mass Percent formula.

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