Question

Be able to calculate the amount of solute when given the ppm or ppb concentrations and the amount of solution or solvent.

Be able to calculate the molarity of a solution when given the mass or moles of solute and the volume of solution.

Be able to calculate the amount of solute (mass or moles) when given the molarity of solution and the volume of solution.

Be able to calculate the volume of solution when given the molarity of solution and the amount solute (mass or moles).

Answer 1

Solution :-

Be able to calculate the amount of solute when given the ppm or ppb concentrations and the amount of solution or solvent.

Ppm is parts per millon

1 ppm = 1 mg solute per L or 1 mg per Kg

Therefore the formula to calculate the is as follows

ppm = mg of solute / L solution

Or ppm = mg of solute / kg solution

Ppb is the parts per billion that’s is microgram of solute per L or per kg

Therefore formula to calculate the ppb is as follows

ppb = microgram of solute / L solution

or ppb = microgram of solute / kg solution

Be able to calculate the molarity of a solution when given the mass or moles of solute and the volume of solution.

Molarity is moles per liter of solution

Therefore formula to calculate the molarity is as follows

Molarity = moles of solute / volume of solution in Liter

Be able to calculate the amount of solute (mass or moles) when given the molarity of solution and the volume of solution.

When we have to find the amount of the solute using the molarity and volume then we can use the formula

Moles = molarity * volume in liter

Once we get moles

Then we can use the following formula to calculate the amount of the solute

Mass = moles of solute * molar mass of solute

Be able to calculate the volume of solution when given the molarity of solution and the amount solute (mass or moles).

When we have to find the volume of solution using the molarity of solution then we can use the following formula

Volume of solution in Liter = moles of solute / molarity of solution

When mass of solute is given then convert mass of solute to its moles using the formula as follows

Moles = mass of solute in gram / molar mass of solute

Then once we get moles of the solute then again we can use the formula

Volume of solution in Liter = moles of solute / molarity of solution

To calculate the volume of the solution