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Home  arrow Chapter 4: Aqueous Reactions and Solution Stoichiometry  arrow Quiz 1

Quiz 1



This activity contains 12 questions.

Question 1.
A 25.0-g sample of garden compost was analyzed for chloride content. The sample was dissolved in water, and the chloride was precipitated as silver chloride. 1.58 g of dried precipitate was obtained. Calculate the percent of chloride in the sample.

 
End of Question 1


Question 2.

An aqueous solution of an unknown solute is tested with litmus paper and found to be acidic. The solution is weakly conducting compared with a solution of NaCl of the same concentration. Which of the following substances could the unknown be: KOH, NH3, HNO3, KClO2, H3PO3, or CH3COCH3?
 
End of Question 2


Question 3.
An aqueous solution of nickel ions will oxidize each of the following metals except

 
End of Question 3


Question 4.
Based on the activity series (Table 4.5), which element will react with a solution of iron ions?

 
End of Question 4


Question 5.
How many milliliters of 0.1000 M Ca(OH)2 solution are needed to supply 0.05000 mol of Ca(OH)2?

 
End of Question 5


Question 6.
Indicate the concentration of each ion or molecule present in a 0.25 M CaBr2 solution.

 
End of Question 6


Question 7.

Some sulfuric acid is spilled on a lab bench. It can be neutralized by sprinkling sodium bicarbonate on it and then mopping up the resultant solution. The sodium bicarbonate reacts with sulfuric acid in the following way:

2NaHCO3 (s) + H2SO4(aq) ---> Na2SO4(aq) + 2CO2(g) + 2 H2O(l)

Sodium bicarbonate is added until the fizzing due to the formation of CO2(g) stops. If 35 mL of 6.0 M H2SO4 was spilled, what is the minimum mass of NaHCO3 that must be added to the spill to neutralize the acid?

 
End of Question 7


Question 8.
The minerals chalcocite (Cu2S) and malachite (Cu2CO3(OH)2) are two primary sources of copper. What is the oxidation state of copper in each of these minerals?

 
End of Question 8


Question 9.
When NaCl is added to a solution of (i) AgNO3, (ii) Pb(NO3)2, or (iii) Ca(NO3)2, in which case(s) does a precipitate form?

 
End of Question 9


Question 10.
Which of the following reactions is an acid-base neutralization reaction?

 
End of Question 10


Question 11.
Write a balanced net ionic equation for the following reaction and identify the spectator ion or ions present.

FeO(s) + 2HClO4(aq) --> H2O(l) + Fe(ClO4)2(aq)

 
End of Question 11


Question 12.
Write a balanced net ionic equation for the reaction, if any, that may occur when the following pair is mixed: Pb(NO3)2 (aq) and MgSO4 (aq).

 
End of Question 12





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