What is the percent by mass of sodium hydrogen carbonate that has 20 grams of solute in 600 mL of water?

To find the percent by mass of sodium hydrogen carbonate in the solution, use the formula for percent by mass, which is:

[

\text{Percent by mass} = \left( \frac{\text{mass of solute}}{\text{mass of solution}} \right) \times 100

]

In this scenario, you have 20 grams of sodium hydrogen carbonate as the solute. The mass of the solvent (water) is needed to determine the total mass of the solution.

To find the mass of the water, note that 600 mL of water has a mass close to 600 grams, given that the density of water is approximately 1 g/mL.

Now, calculate the total mass of the solution:

[

\text{Total mass of solution} = \text{mass of solute} + \text{mass of solvent} = 20 , \text{g} + 600 , \text{g} = 620 , \text{g}

]

Next, substitute the masses into the percent by mass formula:

[

\text{Percent by mass} = \left( \frac{20 , \text{g}}{620 \