What is the mass percentage of 55.0 g of KCl in 125 g of water?
Apply the definition; it hasn't changed since I worked the last problem for you.
Remember, it's
(mass solute/100 g solution)*100 =
(55 g/55 g + 125 g)*100 = ??
To find the mass percentage of KCl in water, we need to calculate the mass of KCl and then divide it by the total mass of the solution (KCl + water), and finally multiply the result by 100.
First, let's find the mass of KCl. We know that it is 55.0 grams.
Now, let's find the total mass of the solution. We have 55.0 grams of KCl and 125 grams of water, so the total mass is 55.0 + 125 = 180 grams.
Next, we divide the mass of KCl by the total mass: 55.0 g / 180 g = 0.3056
Finally, we multiply the result by 100 to convert it to a percentage: 0.3056 * 100 = 30.56%.
Therefore, the mass percentage of 55.0 g of KCl in 125 g of water is 30.56%.