A solution is prepared by dissolving 15grams of table salt in 70grams of water. Find (a) mass percent of solute (b) mass percent of solvent.
Well, well, well, we have a salty situation here! Let's dive right into it:
(a) To find the mass percent of the solute (table salt), we divide the mass of the solute by the total mass of the solution and multiply by 100:
Mass percent of solute = (mass of solute / total mass of solution) x 100
In this case, the mass of the solute (table salt) is 15 grams, and the total mass of the solution (including both the solute and the solvent) is 15 grams (solute) + 70 grams (water) = 85 grams (total mass of solution).
So, the mass percent of the solute is:
(15 grams / 85 grams) x 100 ≈ 17.65%
(b) Now, let's turn our attention to the mass percent of the solvent (water). To do this, we take the mass of the solvent and divide it by the total mass of the solution, then multiply by 100:
Mass percent of solvent = (mass of solvent / total mass of solution) x 100
In this case, the mass of the solvent (water) is 70 grams, and the total mass of the solution is the same as before, 85 grams.
So, the mass percent of the solvent is:
(70 grams / 85 grams) x 100 ≈ 82.35%
Voila! We've solved the salty riddle and determined the mass percent of both the solute and the solvent.
To calculate the mass percent of solute and solvent in the given solution, follow these steps:
Step 1: Calculate the total mass of the solution:
Total mass of the solution = Mass of solute + Mass of solvent
= 15 grams of table salt + 70 grams of water
= 85 grams
Step 2: Calculate the mass percent of solute:
Mass percent of solute = (Mass of solute / Total mass of the solution) x 100
= (15 grams / 85 grams) x 100
= 17.65%
Step 3: Calculate the mass percent of solvent:
Mass percent of solvent = (Mass of solvent / Total mass of the solution) x 100
= (70 grams / 85 grams) x 100
= 82.35%
Therefore, the answers are:
(a) The mass percent of solute in the solution is 17.65%.
(b) The mass percent of solvent in the solution is 82.35%.
To find the mass percent of solute and solvent, we need to know the masses of the solute and solvent in the solution.
In this case, we are given that the mass of the solute (table salt) is 15 grams, and the mass of the solvent (water) is 70 grams.
(a) To find the mass percent of solute, we can use the formula:
Mass percent of solute = (Mass of solute / Mass of solution) × 100
In this case, the mass of the solute is 15 grams, and the total mass of the solution is the sum of the mass of the solute and the solvent:
Mass of solution = Mass of solute + Mass of solvent
Mass of solution = 15 grams + 70 grams
= 85 grams
Now we can plug in the values into the formula:
Mass percent of solute = (15 grams / 85 grams) × 100
Simplifying:
Mass percent of solute = 0.176 × 100
Mass percent of solute ≈ 17.6%
Therefore, the mass percent of the solute (table salt) in the solution is approximately 17.6%.
(b) To find the mass percent of solvent, we use a similar formula:
Mass percent of solvent= (Mass of solvent / Mass of solution) × 100
In this case, the mass of the solvent is 70 grams, and the total mass of the solution is 85 grams (as calculated in part a).
Now we can plug in the values:
Mass percent of solvent = (70 grams / 85 grams) × 100
Simplifying:
Mass percent of solvent = 0.824 × 100
Mass percent of solvent ≈ 82.4%
Therefore, the mass percent of the solvent (water) in the solution is approximately 82.4%.
% w/w means (grams solute/grams solution)*100 = ?
[(15g NaCl/(70+15)]*100 = % NaCl
{(70g H2O/(70+15)]*100 = % H2O