Short answer: 1. Sodium reacts with water to produce hydrogen gas and sodium hydroxide. If 15 g of sodium are added to 75 grams of water, calculate the mass of hydrogen gas that is produced. 2. Calculate the mass (in grams) of sodium sulfide that is needed to make 350 mL of a 0.50 mol/L solution. 3.In a lab 42.6 mL. of sulfuric acid precipitates exactly 3.260 g of barium sulfate from a solution of barium hydroxide. What is the molar concentration of the sulfuric acid?

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Solutions

Solutions can be considered as homogeneous mixtures which contain two or more than two chemical substances. The chemical substance which is the greater part is defined as solvent. And the chemical substance that is dissolved in a solvent is referred to as solute. Solution chemistry plays an important role in chemistry since it supports many commercial applications of solutions.