Programación Estructural

QUIMICA BASICA 2012B

Multiple Choice
Identify the choice that best completes the statement or answers the question.

__E__ 1. Which one of the following is a weak acid?
a.|HClO4|
b.|HCl|
c.|HBr|
d.|HI|
e.|CH3COOH|


__D__ 2. Which one of the following salts is insoluble in water?
a.|FeCl2|
b.|KCH3COO|
c.|Pb(NO3)2|
d.|PbS|
e.|NH4Cl|


___E_ 3. Which one of the following saltsis insoluble in water?
a.|Rb2SO4|
b.|(NH4)2S|
c.|KI|
d.|Cr(NO3)3|
e.|Ni(CO3)2|


__E__ 4. Which one of the following is not a strong electrolyte?
a.|HBr|
b.|HCl|
c.|HClO3|
d.|NaF|
e.|HF|


__D__ 5. Determine the oxidation number of the underlined element in SO32-.
a.|+2|
b.|-2|
c.|+3|
d.|+4|
e.|-3|


___A_ 6. Determine the oxidation number of the underlined element in H2P.a.|+1|
b.|+2|
c.|+3|
d.|+4|
e.|+5|


___A_ 7. Determine the oxidation number of the underlined element in Na2SeO4.
a.|+6|
b.|+2|
c.|+3|
d.|+4|
e.|+5|


__D__ 8. Determine the oxidation number of the underlined element in Se.
a.|+6|
b.|+8|
c.|+3|
d.|+4|
e.|+5|


__C__ 9. Which of the following matched pairs of name and formula has an error?

|Formula|Name|

a.|CrO3chromium(VI) oxide|
b.|AgNO3 silver nitrate|
c.|MgBr2 magnesium(II) bromide|
d.|FeS iron(II) sulfide|
e.|Al2O3 aluminum oxide|


__C__ 10. Which of the following matched pairs of name and formula has an error?

|Formula|Name|

a.|KBrO potassium hypobromite|
b.|K2SO4potassium sulfate|
c.|K2BrO4 potassium perbromate|
d.|KNO2 potassium nitrite|
e.|K2CO3 potassium carbonate|


__B__ 11. Which of the following matched pairs of name and formula has an error?

|Formula|Name|

a.|LiClO2 lithium chlorite|
b.|HIO3 periodic acid|
c.|HClO2chlorous acid|
d.|HBrO hypobromous acid|
e.|Sr(ClO4)2 strontium perchlorate|


__E__ 12. Which of the following reactions is a decomposition reaction?
a.|2H2(g) + O2(g) ® 2H2O()|
b.|Fe2O3(s) + 3CO(g) ® 2Fe(s) + 3CO2(g)|
c.|C3H8(g) + 5O2(g) ® 3CO2(g) + 4H2O()|
d.|2AgNO3(aq) + Zn(s) ® 2Ag(s) + Zn(NO3)2(aq)|
e.|2KClO3(s) ® 2KCl(s) + 3O2(g)|


_B___13. Which response includes all of the following that are displacement reactions, and no other reactions?

I.|P4O10(s) + 6Na2O(s) ® 4Na3PO4(s)|
II.|2AgNO3(aq) + Zn(s) ® 2Ag(s) + Zn(NO3)2(aq)|
III.|Ca(s) + 2HCl(aq) ® CaCl2(aq) + H2(g)|
IV.|Fe(OH)2(s) + 2HCl(aq) ® FeCl2(aq) + 2H2O()|

a.|I and II|
b.|II and III|
c.|II and IV|
d.|I and III|
e.|I, III, and IV|


_A___ 14. Write theformula unit equation for the complete reaction of hydrobromic acid with calcium hydroxide. What is the sum of the coefficients? (Do not forget coefficients of one.)
a.|6|
b.|7|
c.|3|
d.|4|
e.|5|


__A__ 15. Write the balanced total ionic equation for the reaction of nitric acid with aqueous ammonia. What is the coefficient preceding NH3?
a.|1|
b.|2|
c.|3|
d.|4|
e.|5|


_D___ 16. Writethe net ionic equation for the complete neutralization of calcium hydroxide with dilute sulfuric acid. Use H+ rather than H3O+. What is the sum of the coefficients? (Do not forget coefficients of one.)
a.|6|
b.|7|
c.|4|
d.|3|
e.|5|


__B__ 17. Will a precipitate form when 0.1 M aqueous solutions of AgNO3 and NaCl are mixed? If a precipitate does form, identify the precipitate and give thenet ionic equation for the reaction.
a.|No precipitate forms.|
b.|AgCl precipitates. Ag+(aq) + Cl-(aq) ® AgCl(s)|
c.|Ag3N precipitates. 6Ag+(aq) + 2NO3--(aq) ® 2Ag3N(s) + 3O2(g)|
d.|AgCl precipitates. Ag+(aq) + NaCl(aq) ® AgCl(s) + Na+(aq)|
e.|NaNO3 precipitates. NO3-(aq) + Na+(aq) ® NaNO3(s)|


__D__ 18. Which of the following...