2. Volume of solution: 200mL; Concentration: 12.5%
3. Volume of solvent: 42mL; Concentration: 16%
4. Volume of solute: 175mL; Volume of solvent: 75mL
5. Volume of solute: 24mL; Concentration: 6%
Explanation:
1-2
For volume of solution, simply add the volume of solvent and volume of solute.
For the concentration, divide the volume of solute to the volume of the solution, then multiply the answer by 100% (mathematically, ). This is what "70% isopropyl alcohol" means on the packaging - 70% alcohol, 30% water.
3
To get the volume of the solvent, subtract the volume of the solution to the volume of the solute.
4
You can both get the volume of solute and solvent here, but to simplify things, you should get the volume of the solute first, then the solvent.
To get the volume of solute given the total volume and concentration, multiply the volume of the solution to the concentration in decimal form (in this instance, 250 x 0.7). This will give the volume of the solute.
To get the volume of solvent, simply subtract the volume of the solution to the volume of the solute.
5
Similar to 3, subtract the volume of the solution to the volume of solvent to get the volume of solute.
Answers & Comments
Answer:
1. Volume of solution: 100mL; Concentration: 40%
2. Volume of solution: 200mL; Concentration: 12.5%
3. Volume of solvent: 42mL; Concentration: 16%
4. Volume of solute: 175mL; Volume of solvent: 75mL
5. Volume of solute: 24mL; Concentration: 6%
Explanation:
1-2
For volume of solution, simply add the volume of solvent and volume of solute.
For the concentration, divide the volume of solute to the volume of the solution, then multiply the answer by 100% (mathematically, ). This is what "70% isopropyl alcohol" means on the packaging - 70% alcohol, 30% water.
3
To get the volume of the solvent, subtract the volume of the solution to the volume of the solute.
4
You can both get the volume of solute and solvent here, but to simplify things, you should get the volume of the solute first, then the solvent.
To get the volume of solute given the total volume and concentration, multiply the volume of the solution to the concentration in decimal form (in this instance, 250 x 0.7). This will give the volume of the solute.
To get the volume of solvent, simply subtract the volume of the solution to the volume of the solute.
5
Similar to 3, subtract the volume of the solution to the volume of solvent to get the volume of solute.