CHE201-02: General Chemistry and Qualitative Analysis I; Quiz 4 Name: : Date:Sho
ID: 543429 • Letter: C
Question
CHE201-02: General Chemistry and Qualitative Analysis I; Quiz 4 Name: : Date:Show all your work for full credit. Write a balanced molecular, ionic, and net-ionic equations for the following reactions: 1. a. Nas(aq) + CuCl2(aq) b. HNO3(aq) + Ca(OH)2(aq) 2. Determine whether each of the following compounds is soluble or insoluble in water. b. Agl Classify each of the following as strong electrolyte, weak electrolyte or non- electrolyte: 3. a. MgBr d) HCl If 123 ml of a 1.10 M glucose solution is diluted to 500.0 mL, what is the molarity of the dilute solution? 4. 5. Classify each of the following acids as strong or weak. HCIO4 HF H2SO4 HC2HO2 HNO d to neutralize 50.0 mL of what is the molarity of 74.0 mL of HC that isneede 0.085 M Ca(OH)2? Ca(OH)2(aq) + 2HCi(aq) Caci2(aq) + 2H20(i) 6, 7. How many milliliters of 0.10 M H SO, are needed to neutralize 0.15 g of NaOH (Na 23.0 g; O = 16.0 g; H = 1.0 g)? 2NaOH(aq) + H:SOdaq) Na2SO4(aq) + 2HsO(1) 8. Identify which element is oxidized and which is reduced in the reaction: Cl2(aq) + 2Nal(aq) lds) + 2NaCl(aq) 9. What is the concentration of NOs ions present in 0.30 M solution of Fe(NOs)? 10. Which of the following has the highest concentration of hydroxide ions? a) 0.10 M NaOH b) 0.20 M KOH c) 0.20 M Ca(OH2Explanation / Answer
1.
a) Na2S(aq) + CuCl2(aq) --------------- Cus(s) = 2 NaCl(aq)
2 Na+(aq) + S-2(aq) + Cu+2(aq) + 2 Cl-(aq) ------------- CuS(s) + 2 Na+ (aq) + 2Cl-(aq)
Cu+2 (aq) + S-2(aq) -------------- CuS(s)
b) 2 HNO3(aq) + Ca(OH)2(aq) ---------------- Ca(NO3)2 (aq) +2 H2O(l)
2 H+(aq) + 2NO3-(aq) + Ca+2(aq) + 2 OH-(aq) -------------- Ca+2(aq) + 2 NO3-(aq) + 2H2O(l)
2 H+ (aq) + 2 OH-(aq) ------------------ 2 H2O(l)
2.Cu3(PO4)2 AND AgI are insolubel in water and KClO4 is souble in water.
3.a.MgBr2 is a strong electrolyte
b. C12H22O11 is a non-electrolyte because it is covalent compound
c.NH3 ia weak electrolyte
d.HCl is a strong electrolyte
4.for dilute solutions M1V1 = M2V2
M2 = M1V1/V2 = 1.10x123/500 = 0.27M
5. HClO4, H2So4 and HNO3 are strong acids
Hf and HC2H3O2 are weak acids