Answers evaluated for:
dave@brooks
Question 2
hydrogen sulfide is bubbled through a solution of silver nitrate
Ag
+
+ H
2
S ---> Ag
2
S + H
+
Your answer: H
2
S + Ag
+
--> Ag
2
S + H
+
Points Earned This Question: 3
The formulas you have entered for the reactants appear to be correct. The formulas you have entered for the products appear to be correct.
Ppt Tutoring
Question 8
solid sodium cyanide is added to water
NaCN + H
2
O ---> HCN + Na
+
+ OH
-
Your answer: NaCN + H
2
O --> HCN + Na
+
+ OH
-
Points Earned This Question: 3
The formulas you have entered for the reactants appear to be correct. The formulas you have entered for the products appear to be correct.
Question 11
aluminum metal is added to a solution of copper(II) chloride
Al + Cu
2+
---> Cu + Al
3+
Your answer: Al + Cu
2+
--> Al
3+
+ Cu
Points Earned This Question: 3
The formulas you have entered for the reactants appear to be correct. The formulas you have entered for the products appear to be correct.
Question 29
hydrogen gas is passed over hot copper(II) oxide
H
2
+ CuO ---> Cu + H
2
O
Your answer: No responses sent.
Points Earned This Question: 0
You have not entered the formula(s) for any reactant(s). You have not entered the formula(s) for any product(s).
Question 57
water is added to a sample of pure sodium hydride
NaH + H
2
O ---> H
2
+ Na
+
+ OH
-
Your answer: No responses sent.
Points Earned This Question: 0
You have not entered the formula(s) for any reactant(s). You have not entered the formula(s) for any product(s).
Question 117
excess concentrated potassium hydroxide solution is added to a precipitate of zinc hydroxide
Zn(OH)
2
+ OH
-
---> Zn(OH)
4
2-
The zinc also may be written as ZnO
2
2-
.
Your answer: No responses sent.
Points Earned This Question: 0
You have not entered the formula(s) for any reactant(s). You have not entered the formula(s) for any product(s).
Question 191
equal volumes of equimolar solutions of disodium hydrogen phosphate and hydrochloric acid are mixed
HPO
4
2-
+ H
+
---> H
2
PO
4
-
Your answer: No responses sent.
Points Earned This Question: 0
You have not entered the formula(s) for any reactant(s). You have not entered the formula(s) for any product(s).
Question 203
ethene gas is burned in air
C
2
H
4
+ O
2
---> CO
2
+ H
2
O
Your answer: No responses sent.
Points Earned This Question: 0
You have not entered the formula(s) for any reactant(s). You have not entered the formula(s) for any product(s).
Total Points Earned: 9/24 maximum. Remember, the first five answers are scored on the actual AP Chem test, and the maxium points = 15.
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