Question

1. Find the molarity of 2.39 g Lif in 450 mL of water

Answer 1

Answer:

0.205M

Explanation:

Molarity is an unit of concentration used in chemistry defined as the ratio between moles of solute (In this case, LiF) and liters of solution.

To solve this question, we must find the moles of LiF and the liters of the solution:

Moles LiF -Molar mass: 25.939g/mol-:

2.39g * (1mol / 25.939g) = 0.0921moles

Liters solution:

450mL * (1L / 1000mL) = 0.450L

Molarity is:

0.0921 moles / 0.450L =

0.205M