What is the percent by mass of NaHCO3 in a solution containing 20 g of NaHCO3 dissolved in 700 ml of H20?

• Percent by mass = 78%

Explanation:

Mass of sodium bicarbonate / Mass of sodium bicarbonate solution × 100%

The mass of sodium bicarbonate solution will be mass of water plus the mass of sodium bicarbonate

700 ml(g) + 20 g = 720 grams

Mass of Sodium Bicarbonate = 20 grams

Percent by mass = 20 g / 720 g * 100% = 2.78%