Numerical on Concentration Terms.

 

 1) Determine the molarity and molality for each of the following solutions:

1. 0.444 mol of CoCl2 in 0.654 L of solution (d=1.24g/mL)
2. 98.0 g of phosphoric acid, H3PO4, in 1.00 L of solution ( d= 1.3g/mL)
3. 0.2074 g of calcium hydroxide, Ca(OH)2, in 40.00 mL of solution (d=2g/ml)
4. 10.5 kg of Na2SO4·10H2O in 18.60 L of solution(d=1.1g/ml)

2) Determine the molarity and normality of each of the following solutions:

1. 1.457 mol KCl in 1.500 L of solution
2. 0.515 g of H2SO4 in 1.00 L of solution
3. 20.54 g of Al(NO3)3 in 1575 mL of solution
4. 2.76 kg of CuSO4·5H2O in 1.45 L of solution.

3) Calculate the concentration expressed in grams% (w/v) of a 1 M solution of HCl (Mw=36)

4) You need to withdraw 200 grams of a KCl solution  having density = 1.16 g/ml. How many ml of the solution you will withdraw ?

5) Calculate mole fraction of 4g of NaOH , 10g of Ca(OH)2 and 90g of  water.

6) 12 g of NaCl is dissolved in 90 g of water to make solution and density was found to be 1.11g/mL

Calculate %w/w, %w/v, molarity, molality, mole fraction and normality.