Question 4: Chemical Reactions (16 points)

a. A student is instructed to make 1 L of a 2.0 M solution of CaCl2 using dry salt. How should he do this? (4 points)
b. The student's lab manual says to mix some of his CaCl2 solution with an aqueous solution of sodium carbonate (Na2CO3). (8 points)
i. What evidence of a chemical reaction would he expect to see? Explain your answer. (2 points)
ii. Write a balanced chemical equation to show the reaction. Include state symbols. (4 points)
iii. What kind of reaction is this? (2 points)
c. CaCl2 can be melted to produce calcium metal and give off chlorine gas. The equation for this is CaCl2(l) Ca(s) + Cl2(g). If 277.45 g CaCl2 were melted, how many grams of Ca(s) would be formed? (4 points)