What is the percent by mass of NaHCO3 in a solution containing 60 g of NaHCO3 dissolved in 500 mL of H2O
(mass solute/mass soln)*100 = ??
[60/(60+500)]*100 =
(60/500)=0.2
0.2*100=20
20 is your answer
To calculate the percent by mass of NaHCO3 in a solution, you need to divide the mass of NaHCO3 by the total mass of the solution and then multiply by 100.
First, let's find the total mass of the solution. The solution is composed of NaHCO3 and H2O. To find the mass of the solution, we need to convert the volume of water (500 mL) to grams.
The density of water is approximately 1 g/mL, so 500 mL of water would weigh 500 g.
Now, let's calculate the total mass of the solution:
Mass of solution = Mass of NaHCO3 + Mass of H2O
Mass of solution = 60 g + 500 g
Mass of solution = 560 g
Next, we can calculate the percent by mass of NaHCO3 in the solution:
% by mass of NaHCO3 = (Mass of NaHCO3 / Mass of solution) x 100
% by mass of NaHCO3 = (60 g / 560 g) x 100
% by mass of NaHCO3 = 10.71%
Therefore, the percent by mass of NaHCO3 in the solution is approximately 10.71%.