Question

1. Calculate the concentration in moles per liter (M) of a solution that contains 0.49 mol CuSO4 and has a volume of 0.74 L. Concentration = ____ M 2. Calculate the concentration in moles per liter (M) of a solution that contains 0.78 mol Co(NO3)2 and has a volume of 0.34 L. Concentration = _____ M 3. Calculate the concentration in moles per liter (M) of a solution that contains 0.30 mol K2Cr2O4 and has a volume of 0.84 L. Concentration = _____ M

Answer 1

Answer:

1. 0.662 M

2. 2.294 M

3. 0.357 M

Explanation:

The Molarity of a compound is simply defined as the mole of compound per unit litre of the solution. It can be obtained mathematically by the following equation:

Molarity = mole /Volume

With the equation above, let us calculate the molarity for the question given above.

1. Mole of CuSO4 = 0.49 mol Volume = 0.74 L.

Molarity of CuSO4 =?

Molarity = mole /Volume

Molarity of CuSO4 = 0.49/0.74

Molarity of CuSO4 = 0.662 M

2. Mole of Co(NO3)2 = 0.78 mol Volume = 0.34 L.

Molarity of Co(NO3)2 =?

Molarity = mole /Volume

Molarity of Co(NO3)2 = 0.78/0.34

Molarity of Co(NO3)2 = 2.294 M

3. Mole of K2Cr2O4 = 0.30 mol Volume = 0.84L.

Molarity of K2Cr2O4 =?

Molarity = mole /Volume

Molarity of K2Cr2O4 = 0.30/0.84

Molarity of K2Cr2O4 = 0.357 M