Question

which of the following do you need to know to be able to calculate the molarity of a salt solution? i. the mass of salt added ii. the molar mass of the salt iii . the volume of water added iv. the total volume of the solution

Answer 1

See below.

Step-by-step explanation:

i. the mass of salt added YES

ii. the molar mass of the salt YES

iii . the volume of water added NO, since the total volume of the solution (iv) is all that is needed.

iv. the total volume of the solution YES

Molarity (concentration) requires mole of the solute, calculated from (i) (mass of salt) and ii (molar mass of salt) since moles = grams/(molar mass) and the total volume (iv). Molarity = moles/liter