EXAMINATION TEST 2026 COMPLETE 200
QUESTIONS WITH VERIFIED ANSWERS
⩥ The chemical reaction below is at equilibrium with an equilibrium
constant of Kc
=5
If the reaction is in a 2L container and there are 4 moles HCl, 2 moles
O2, 3 moles H2O, then how many moles of Cl2 are in the container?
4HCl(g)+O2(g)->2H2o(g)+2Cl2(g). Answer: 12 moles
⩥ NaNO3 has a solubility of 88.0 g in 100. g of water. If I add 44.0 g of
NaNO3 into 49.0 g of water, is the solution saturated or unsaturated?.
Answer: saturated
⩥ If the solution is saturated, how many grams of NaNO3 are on the
bottom of the container?. Answer: 44.0 - 43.1 = 0.9 g
⩥ Which of the following changes will decrease the reaction rate for the
chemical reaction 2CO + O2 à 2CO2?
[A] adding O2 to the reaction mixture
[B] adding a catalyst to the reaction mixture
,[C] removing CO from the reaction mixture
[D] lowering the temperature of the reaction mixture
[E] adding N2 to the reaction mixture. Answer: Trick Question, 2 will!
[C] removing CO from the reaction mixture
[D] lowering the temperature of the reaction mixture
⩥ Which of the following is the correct equilibrium
constant expression for the reaction
4HCl(g)+O2(g)->2H2O(g)+2Cl2(g). Answer: [Cl2
]^2[H2O]^2/[HCl]^4[O2]
⩥ The solubility rule "like dissolves like" is not adequate for
predicting solubilities when the solute is a(n)
[A] nonpolar liquid
[B] polar liquid
[C] ionic compound
[D] nonpolar gas. Answer: [C] ionic compound
⩥ In which of the following pairs of ionic compounds are
both members of the pair soluble in water?
[A] NaOH and K2SO4
, [B] CaSO4 and PbCO3
[C] NH4Br and Mg3(PO4)2
[D] AgNO3 and AgCl
[E] more than one of the above is correct. Answer: [A] NaOH and
K2SO4
⩥ Calculate the grams of NaOH present in 5.0 mL of a
1.0% (m/v) NaOH solution.
[A] 0.050 g
[B] 0.10 g
[C] 0.50 g
[D] 1.0 g. Answer: [A] 0.050 g
⩥ A 0.200 M solution of NaOH which contains 0.250 mole of solute
would have a volume, in milliliters, of
[A] 725 mL
[B] 1250 mL
[C] 50.0 mL
[D] 20.0 mL. Answer: [B] 1250 mL
⩥ How many of the following statements are true. Compared to pure
water, a