What mass of sodium carbonate is needed to produce 500mL, of a solution that is

Question

What mass of sodium carbonate is needed to produce 500mL, of a solution that is 0.200 M in [Na^+]? You have a flask with a solution of calcium nitrate, silver(I) nitrate, and chromium(III) nitrate. To this you add a solution of potassium bromide which results in the formation of a pale yellow solid, which is removed by filtration. To the remaining solution you add a solution of potassium sulfate which results in the formation of a white solid, which is removed by friction. To the remaining solution you add a solution of potassium sulfide which results in the formation of a dark brown solid. Solubility Rules Compounds of 1A metal ions and NH_4^+ are soluble. Compounds of NO_3^-, ClO_3^-, ClO_4^-, and C_2 H_3 O_2^- ions are soluble expect those of Ag^+, Cu^+, Tl^+ Hg_2^2+, and Pb^2+. Compounds of SO_4^2- are soluble expect those of Ca^2+, Sr^2+, Ba^2+, and Pb^2+. Most other ionic compounds are insoluble. Identify the yellow, white and brown solids, giving the proper chemical formula in the table below. Write the net equations for the formation of the yellow, white and brown solids in the table below. Be sure to include states of matter. What is the difference between a precipitation reaction and a dissolution reaction?

Explanation / Answer

6. Moles:- volume(in Litres) ×molarity

Moles of Na+:- 500×0.200/1000=0.1

Moles of Na2CO3:- 0.1/2=0.05

Mass of Na2CO3:-0.05×molar mass=0.05×106=5.3g

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