Question

1. (a) How much Ca(NO3)2, in mg must be present in 50 ml of a solution with 2.35 ppm of Ca? (d = 1 g/oc)
(b) What is the molarity of NaCl solution having 1.52 ppm of Na and the solution density is 1.0 g/cm^3?
2. Calculate the ionic strength (in g/litre)of a solution containing 0.2 M NaCl and 0.1 M Na2SO4.
3. What volume of water should be added to 50 mL of HNO3 having density 15 g ml^-1and 63.0% by weight to have one molar solution.
4. 5 g of K2SO4, was dissolved in 250 mL of solution. How many mL of this solution should be used so that 2.33 g of BaSO4, may be precipitated from BaCl2, solution.
K2SO4+BaCl2– BaSO4+2KCI
5. In a solution, the concentration of CaCl2, is 5 M and that of MgCl2 is 5 m. The specific gravity of solution is 1.05.
Calculate the concentration of Cl^- in the solution in terms of molarity.
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Answer 1

Answer:

Molarity is the concentration of x moles of solute in 1 L of solution. ... How many moles of Co2+ are present in 0.200 L of a 0.400 M solution of CoI2? .... If 450 mL of 6.0 M KBr solution is diluted to 900 mL, what is the concentration of the KBr solution .... If I add water to 100 mL of a 0.15 M NaOH solution until the final volume

Explanation: