Untitled - Kelly Walsh High School

Aqueous Solutions 77
25. The titration of 25.00 mL of 0.1000 M Ca(OH) 2 required 30.00 mL of HNO 2
solution. What was the concentration of the HNO 2 solution?
26. The titration of 25.00 mL of 0.1000 M HNO 2 required 30.00 mL of Ca(OH) 2
solution. What was the concentration of the Ca(OH) 2 solution?
27. What volume of 0.1000 M HNO 2 solution is necessary to titrate 45.00 mL
of 0.01000 M Ca(OH) 2?
28. What volume of 0.01500 M Ca(OH) 2 solution is necessary to titrate 40.00 mL
of 0.2000 M HNO 2?
ANSWER KEY
1. False 2. True 3. c 4. a 5. e 6. d 7. b 8. acids 9. bases
10. acid, base 11. base, acid 12. redox 13. Mg 14. Ag 15. Ag
16. Mg 17. 0 18. strong 19. spectator 20. endpoint
21. a. Ba(OH) 2(aq) H2SO4(aq) l BaSO4(s) 2 H2O(l) b. 2 KOH(aq) FeCl2(aq) l Fe(OH) 2(s) 2 KCl(aq)
c. NH4NO3(aq) Na2SO4(aq) l NR
d. 2 HC2H3O2(aq) CaCO3(s) l Ca(C2H3O2) 2(aq) H2O(l) CO2(g) e. 2 K3PO4(aq) 3 Ca(NO2) 2(aq) l Ca3(PO4) 2(s) 6 KNO2(aq) 22. a. Ba2 (aq) 2 OH (aq) 2 H 2 (aq) SO4 (aq)
l BaSO4(s) 2 H2O(l) b. 2 K (aq) 2 OH (aq) Fe2 (aq) 2 Cl (aq)
l Fe(OH) 2(s) 2 K (aq) 2 Cl (aq)
c. No reaction, but you can write:
2 NH4 (aq) NO3 (aq) 2 Na (aq) SO4 (aq) l NR
d. 2 HC2H3O2(aq) CaCO3(s) l Ca2 (aq) 2 C2H3O2 (aq) H2O(l) CO2(g) e. 6 K 3 2 (aq) 2 PO4 (aq) 3 Ca (aq) 6 NO2 (aq)
l Ca3(PO4) 2(s) 6 K (aq) 6 NO2 (aq)
23. a. Ba2 (aq) 2 OH (aq) 2 H 2 (aq) SO4 (aq)
l BaSO4(s) 2 H2O(l) b. 2 OH2(aq) Fe2 (aq) l Fe(OH) 2(s)
c. No reaction
d. 2 HC2H3O2(aq) CaCO3(s) l Ca2 (aq) 2 C2H3O2 (aq) H2O(l) CO2(g) 3 2 e. 2 PO4 (aq) 3 Ca (aq) l Ca3(PO4) 2(s)