What is the percent by mass of nahco3 in a solution containing 10 g of nahco3 dissolved in 400 ml of h2o?

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Chemistry

Thomas

4 May, 12:17

What is the percent by mass of nahco3 in a solution containing 10 g of nahco3 dissolved in 400 ml of h2o?

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Mckenna Banks · Answer 1

Answer is: the percent by mass of NaHCO₃ is 2,43%.

m (NaHCO₃) = 10 g.

V (H₂O) = 400 ml.

d (H₂O) = 1 g/ml.

m (H₂O) = V (H₂O) · d (H₂O).

m (H₂O) = 400 ml · 1 g/ml.

m (H₂O) = 400 g.

m (solution) = m (H₂O) + m (NaHCO₃).

m (solution) = 400 g + 10 g.

m (solution) = 410 g.

ω (NaHCO₃) = 10 g : 410 g · 100%.

ω (NaHCO₃) = 2,43 %