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Exam 5: Molecular View of Reactions in Aqueous Solutions

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Question 111

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When HF(g)is dissolved in water, the name of the acid that is formed is ________

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Question 112

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In the reaction between aqueous silver nitrate and aqueous potassium chromate, what is the identity of the soluble substance that is formed?

A) silver chromate
B) silver nitrate
C) potassium chromate
D) potassium nitrate
E) No reaction takes place since all products are soluble.

F) A) and D)
G) A) and B)

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Question 113

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When HCl and NaOH are mixed in a 1-to-1 ratio, an ________ reaction occurs.

Which is a nonelectrolyte?

Nitric acid will dissolve a solid sample of calcium carbonate and no solid residue will remain.

When HI(g)is dissolved in water, the name of the acid that is formed is ________

An aqueous solution contains one solute which is either sodium carbonate, sodium sulfate, or potassium nitrate. Addition of a barium chloride solution to a sample of the solution did not cause any visible chemical change. A student stated that it is possible to tell exactly which solute is present from this preliminary test. Is this true or false?

What is the name of the oxoacid HIO₂?

How many grams of MgCl₂ would be required to prepare 0.750 L of a solution that is 0.350 M in chloride ions?

What is the name of the oxoacid HClO₃?

What volume of 0.250 M AgNO₃(aq) is required to react with 35.0 mL of 0.210 M CaBr₂(aq) in the reaction below? 2 AgNO₃(aq) + CaBr₂ (aq) $\rarr$ Ca(NO₃) ₂(aq) + 2AgBr(s)

Which is a basic anhydride?

ZnCO₃(s) is insoluble in water, but dissolves in excess 6.0 molar HCl(aq) . Which equation best describes this reaction?

A 250.0 mL sample of a solution containing potassium dichromate as the only solute was evaporated to dryness, then the residue was carefully dried in the oven at the recommended temperature. The oven-dried residue weighed 16.58 grams. What was the molarity of the potassium dichromate solution? Hint: Remember the molarity formula is moles of solute/liters of solution.

An ore containing lead carbonate, PbCO₃, was analyzed. All of the lead in a 1.836 gram sample was converted to PbSO₄(s) using a standard procedure involving treatment with HNO₃(aq) followed by treatment with Na₂SO₄ solution. The lead sulfate which was recovered weighed 333 mg. What is the percent, by weight, of lead in the ore? Hint: You should write out each reaction on paper and work backwards through the reactions.

Which compound produces four ions per formula unit by dissociation when dissolved in water?

In the reaction, K₂SO₄(aq) + Ba(NO₃) ₂(aq) $\rarr$ BaSO₄(s) + 2 KNO₃(aq) , which ions are the spectator ions?

Write the net ionic equation for the reaction which occurs when silver nitrate (AgNO₃)reacts with sodium chloride (NaCl)to form a precipitate. Include states in the equation.

A 36.0 mL sample of aqueous sulfuric acid was titrated with 0.250 M KOH(aq) until the acid-base indicator signaled that the solution was neutralized. The mixture was then carefully evaporated to dryness, the residue was dried in a drying oven. The residue was then weighed and a value of 861 mg was obtained for its mass. Calculate a value for the volume of the potassium hydroxide solution that was used in the titration from this data. Hint: Write out the neutralization reaction before proceeding with the problem.

How many moles of MgCl₂ would be required to prepare 0.750 L of a solution that is 0.350 M in MgCl₂(aq) ?