Question 1

What is the formula of the precipitate that forms when aqueous NaCl and aqueous Hg₂(NO₃)₂ are mixed?

Accepted Answer

When NaCl and Hg₂(NO₃)₂ are mixed, Hg₂Cl₂ (mercury(I) chloride) precipitates because it is insoluble in water.

Question 2

Oxalic acid (H₂C₂O₄), a diprotic acid that is used in many cleaning and bleaching applications, can be toxic in high amounts when ingested.In 100 grams of parsley, there are about 0.02 moles of oxalic acid.Which of the following would completely neutralize this quantity of oxalic acid?

Accepted Answer

Oxalic acid is a diprotic acid, meaning it can donate two protons. Therefore, 0.02 moles of oxalic acid require 0.04 moles of OH⁻ for complete neutralization. 0.4 L of 0.1 M KOH provides 0.04 moles of OH⁻, which is sufficient to neutralize the oxalic acid.

Question 3

If 12.8 g lead(II) sulfate 303.26 g/mol) precipitates when excess potassium chloride is added to 1.65 L of a water sample, what is the molar concentration of Pb^₂+in the sample?

Accepted Answer

The answer of If 12.8 g lead(II) sulfate 303.26 g/mol)...

Question 4

Which of the following ionic compounds is insoluble in water?

Accepted Answer

Copper(II) sulfide (CuS) is insoluble in water according to solubility rules, which state that most sulfides are insoluble except those of alkali metals and ammonium.

Question 5

Approximately 192 grams of ammonium nitrate (80.04 g/mol) will dissolve in 100 grams of water at 20 $\degree$C.If 21.0 mol NH₄NO₃ is dissolved in 875 g H₂O, the solution is

Accepted Answer

The answer of Approximately 192 grams of ammonium nitrate (80.04...

Question 6

How many grams of nickelII) phosphate (366.02 g/mol) will precipitate if excess sodium phosphate is added to 1.20 L of 0.684 M nicke(lII) acetate?

Accepted Answer

The balanced chemical equation is:Ni(CH3COO)2(aq) + Na3PO4(aq) → Ni3(PO4)2(s) + 2CH3COONa(aq)From the stoichiometry of the balanced equation, we see that 1 mol of Ni(CH3COO)2 reacts with 1 mol of Na3PO4 to produce 1 mol of Ni3(PO4)2.Therefore, the number of moles of Ni3(PO4)2 that will precipitate is equal to the number of moles of Ni(CH3COO)2 in the solution.The number of moles of Ni(CH3COO)2 in the solution is:moles of Ni(CH3COO)2 = concentration of Ni(CH3COO)2 × volume of solution= 0.684 M × 1.20 L= 0.8208 molTherefore, the number of moles of Ni3(PO4)2 that will precipitate is also 0.8208 mol.The mass of Ni3(PO4)2 that will precipitate is:mass of Ni3(PO4)2 = number of moles of Ni3(PO4)2 × molar mass of Ni3(PO4)2= 0.8208 mol × 366.02 g/mol= 300.0 gTherefore, the correct answer is A) 1.00 × 10^2 g.

Question 7

Which of the following compounds is most soluble in water?

Accepted Answer

Cu(NO3)2 is most soluble in water because nitrates (NO3-) are generally soluble in water without exception, making compounds containing the nitrate ion highly soluble.

Question 8

Most chloride salts are soluble.Which of the following is an exception to this generalization?

Accepted Answer

PbCl2 is an exception to the general rule that most chloride salts are soluble. It is sparingly soluble in water, making it one of the few chloride salts that does not readily dissolve.

Question 9

What is the formula of the precipitate that forms when aqueous ammonium phosphate and aqueous copper(II) chloride are mixed?

Accepted Answer

When ammonium phosphate ((NH₄)₃PO₄) and copper(II) chloride (CuCl₂) are mixed, copper(II) phosphate (Cu₃(PO₄)₂) precipitates out of the solution.

Question 10

Write the net ionic equation for the reaction that takes place between aqueous copperII) nitrate and aqueous potassium phosphate.

Accepted Answer

The net ionic equation involves only the ions that form the precipitate. Copper(II) ions (Cu²⁺) and phosphate ions (PO₄³⁻) combine to form copper(II) phosphate (Cu₃(PO₄)₂), which is insoluble in water and precipitates out of the solution.

Question 11

What is the formula of the precipitate that forms when aqueous potassium sulfide and aqueous silver nitrate are mixed?

Accepted Answer

When aqueous potassium sulfide (K2S) and aqueous silver nitrate (AgNO3) are mixed, silver sulfide (Ag2S) precipitates out of the solution.

Question 12

How many grams of iron(III) hydroxide (106.87 g/mol) will precipitate if excess iron(III) nitrate is added to 0.850 L of 1.26 M sodium hydroxide?

Accepted Answer

The reaction between iron(III) nitrate and sodium hydroxide can be represented by the balanced chemical equation: Fe(NO3)3 + 3NaOH -> Fe(OH)3 + 3NaNO3. From the equation, 1 mole of Fe(NO3)3 reacts with 3 moles of NaOH to produce 1 mole of Fe(OH)3. Given that the concentration of NaOH is 1.26 M in 0.850 L, the moles of NaOH are 1.26 mol/L * 0.850 L = 1.071 moles. Since it takes 3 moles of NaOH to react with 1 mole of Fe(NO3)3, the limiting reagent here is NaOH, which will produce 1.071 / 3 = 0.357 moles of Fe(OH)3. The mass of Fe(OH)3 precipitated is then 0.357 moles * 106.87 g/mol = 38.2 grams.

Question 13

Write the net ionic equation for the reaction that takes place between aqueous magnesium chloride and aqueous sodium hydroxide.

Accepted Answer

The net ionic equation for the reaction between magnesium chloride and sodium hydroxide is $Mg^{2+}(aq) + 2OH^-(aq) \rightarrow Mg(OH)_2 (s)$, which shows the magnesium ion reacting with hydroxide ions to form magnesium hydroxide precipitate.

Question 14

Hard water, which contains Mg²⁺ and Ca ²⁺ ions, tends to form a ring in a bathtub due to its reaction with the soluble anions in soap.The formation of this insoluble material is an example of

Accepted Answer

The formation of an insoluble material (such as soap scum) from the reaction of hard water (which contains magnesium and calcium ions) with soap is an example of a precipitation reaction. This occurs when the ions from hard water react with the anions in soap to form an insoluble compound that precipitates out of solution.

Question 15

What is the formula of the precipitate that forms when aqueous Fe(NO₃)₃ and aqueous Na₂CO₃ are mixed?

Accepted Answer

When Fe(NO₃)₃ and Na₂CO₃ are mixed, Fe³⁺ ions react with CO₃²⁻ ions to form Fe₂(CO₃)₃, which is insoluble in water and precipitates out.

Question 16

Chalk contains calcium carbonate.What would be the best solution for cleaning the chalk off a sidewalk?

Accepted Answer

Vinegar, which is acidic, can dissolve calcium carbonate effectively, making it the best choice for cleaning chalk off a sidewalk.

Question 17

Limescale that builds up in showers, kettles, and pipes is often primarily composed of calcium carbonate.One limescale remover contains sulfamic acid (H₃NSO₃), which can be considered to be a strong monoprotic acid.Which reaction summarizes the action of sulfamic acid on limescale?

Accepted Answer

The correct reaction involves sulfamic acid reacting with calcium carbonate to produce carbon dioxide gas, water, calcium ions, and sulfamate ions. This is represented in option C, where sulfamic acid (HSO3NH2) reacts with calcium carbonate (CaCO3) to produce CO2 gas, H2O, Ca2+ ions, and sulfamate ions (HSO3NH2).

Question 18

What mass of silver chloride will be recovered if excess sodium chloride is added to 0.500 L of solution containing 10.79 g of Ag⁺?

Accepted Answer

The molar mass of Ag+ is approximately 107.9 g/mol, and the molar mass of AgCl is approximately 143.3 g/mol. First, calculate the moles of Ag+ in the solution: 10.79 g / 107.9 g/mol = 0.1 mol. Since the reaction between Ag+ and Cl- to form AgCl is a 1:1 ratio, 0.1 mol of AgCl will be formed. The mass of AgCl is then 0.1 mol * 143.3 g/mol = 14.33 g, which is closest to 14.3 g.

Question 19

Which best describes the reaction that takes place between aqueous leadII) acetate and aqueous ammonium chloride?

Accepted Answer

The answer of Which best describes the reaction that takes...

Question 20

Which best describes the reaction that takes place between aqueous barium nitrate and aqueous sodium sulfate?

Accepted Answer

The reaction between aqueous barium nitrate and aqueous sodium sulfate produces barium sulfate as a precipitate and sodium nitrate remains in solution. This is a double displacement reaction where the cations and anions switch partners, resulting in the formation of an insoluble salt (barium sulfate) and a soluble salt (sodium nitrate).

Quiz 8: Aqueous Solutions Chemistry of the Hydrosphere

What is the formula of the precipitate that forms when aqueous NaCl and aqueous Hg₂(NO₃) ₂ are mixed?

Oxalic acid (H₂C₂O₄) , a diprotic acid that is used in many cleaning and bleaching applications, can be toxic in high amounts when ingested.In 100 grams of parsley, there are about 0.02 moles of oxalic acid.Which of the following would completely neutralize this quantity of oxalic acid?

If 12.8 g lead(II) sulfate 303.26 g/mol) precipitates when excess potassium chloride is added to 1.65 L of a water sample, what is the molar concentration of Pb^₂+in the sample?

Which of the following ionic compounds is insoluble in water?

Approximately 192 grams of ammonium nitrate (80.04 g/mol) will dissolve in 100 grams of water at 20 $\degree$ C.If 21.0 mol NH₄NO₃ is dissolved in 875 g H₂O, the solution is

How many grams of nickelII) phosphate (366.02 g/mol) will precipitate if excess sodium phosphate is added to 1.20 L of 0.684 M nicke(lII) acetate?

Which of the following compounds is most soluble in water?

Most chloride salts are soluble.Which of the following is an exception to this generalization?

What is the formula of the precipitate that forms when aqueous ammonium phosphate and aqueous copper(II) chloride are mixed?

Write the net ionic equation for the reaction that takes place between aqueous copperII) nitrate and aqueous potassium phosphate.

What is the formula of the precipitate that forms when aqueous potassium sulfide and aqueous silver nitrate are mixed?

How many grams of iron(III) hydroxide (106.87 g/mol) will precipitate if excess iron(III) nitrate is added to 0.850 L of 1.26 M sodium hydroxide?

Write the net ionic equation for the reaction that takes place between aqueous magnesium chloride and aqueous sodium hydroxide.

Hard water, which contains Mg²⁺ and Ca ²⁺ ions, tends to form a ring in a bathtub due to its reaction with the soluble anions in soap.The formation of this insoluble material is an example of

What is the formula of the precipitate that forms when aqueous Fe(NO₃) ₃ and aqueous Na₂CO₃ are mixed?

Chalk contains calcium carbonate.What would be the best solution for cleaning the chalk off a sidewalk?

Limescale that builds up in showers, kettles, and pipes is often primarily composed of calcium carbonate.One limescale remover contains sulfamic acid (H₃NSO₃) , which can be considered to be a strong monoprotic acid.Which reaction summarizes the action of sulfamic acid on limescale?

What mass of silver chloride will be recovered if excess sodium chloride is added to 0.500 L of solution containing 10.79 g of Ag⁺?

Which best describes the reaction that takes place between aqueous leadII) acetate and aqueous ammonium chloride?

Which best describes the reaction that takes place between aqueous barium nitrate and aqueous sodium sulfate?

Quiz 8: Aqueous Solutions Chemistry of the Hydrosphere

What is the formula of the precipitate that forms when aqueous NaCl and aqueous Hg2(NO3) 2 are mixed?

Oxalic acid (H2C2O4) , a diprotic acid that is used in many cleaning and bleaching applications, can be toxic in high amounts when ingested.In 100 grams of parsley, there are about 0.02 moles of oxalic acid.Which of the following would completely neutralize this quantity of oxalic acid?

If 12.8 g lead(II) sulfate 303.26 g/mol) precipitates when excess potassium chloride is added to 1.65 L of a water sample, what is the molar concentration of Pb2+ in the sample?

Which of the following ionic compounds is insoluble in water?

Approximately 192 grams of ammonium nitrate (80.04 g/mol) will dissolve in 100 grams of water at 20 °\degree° C.If 21.0 mol NH4NO3 is dissolved in 875 g H2O, the solution is

How many grams of nickelII) phosphate (366.02 g/mol) will precipitate if excess sodium phosphate is added to 1.20 L of 0.684 M nicke(lII) acetate?

Which of the following compounds is most soluble in water?

Most chloride salts are soluble.Which of the following is an exception to this generalization?

What is the formula of the precipitate that forms when aqueous ammonium phosphate and aqueous copper(II) chloride are mixed?

Write the net ionic equation for the reaction that takes place between aqueous copperII) nitrate and aqueous potassium phosphate.

What is the formula of the precipitate that forms when aqueous potassium sulfide and aqueous silver nitrate are mixed?

How many grams of iron(III) hydroxide (106.87 g/mol) will precipitate if excess iron(III) nitrate is added to 0.850 L of 1.26 M sodium hydroxide?

Write the net ionic equation for the reaction that takes place between aqueous magnesium chloride and aqueous sodium hydroxide.

Hard water, which contains Mg2+ and Ca 2+ ions, tends to form a ring in a bathtub due to its reaction with the soluble anions in soap.The formation of this insoluble material is an example of

What is the formula of the precipitate that forms when aqueous Fe(NO3) 3 and aqueous Na2CO3 are mixed?

Chalk contains calcium carbonate.What would be the best solution for cleaning the chalk off a sidewalk?

Limescale that builds up in showers, kettles, and pipes is often primarily composed of calcium carbonate.One limescale remover contains sulfamic acid (H3NSO3) , which can be considered to be a strong monoprotic acid.Which reaction summarizes the action of sulfamic acid on limescale?

What mass of silver chloride will be recovered if excess sodium chloride is added to 0.500 L of solution containing 10.79 g of Ag+?

Which best describes the reaction that takes place between aqueous leadII) acetate and aqueous ammonium chloride?

Which best describes the reaction that takes place between aqueous barium nitrate and aqueous sodium sulfate?

What is the formula of the precipitate that forms when aqueous NaCl and aqueous Hg₂(NO₃) ₂ are mixed?

Oxalic acid (H₂C₂O₄) , a diprotic acid that is used in many cleaning and bleaching applications, can be toxic in high amounts when ingested.In 100 grams of parsley, there are about 0.02 moles of oxalic acid.Which of the following would completely neutralize this quantity of oxalic acid?

If 12.8 g lead(II) sulfate 303.26 g/mol) precipitates when excess potassium chloride is added to 1.65 L of a water sample, what is the molar concentration of Pb^₂+in the sample?

Approximately 192 grams of ammonium nitrate (80.04 g/mol) will dissolve in 100 grams of water at 20 $\degree$ C.If 21.0 mol NH₄NO₃ is dissolved in 875 g H₂O, the solution is

Hard water, which contains Mg²⁺ and Ca ²⁺ ions, tends to form a ring in a bathtub due to its reaction with the soluble anions in soap.The formation of this insoluble material is an example of

What is the formula of the precipitate that forms when aqueous Fe(NO₃) ₃ and aqueous Na₂CO₃ are mixed?

Limescale that builds up in showers, kettles, and pipes is often primarily composed of calcium carbonate.One limescale remover contains sulfamic acid (H₃NSO₃) , which can be considered to be a strong monoprotic acid.Which reaction summarizes the action of sulfamic acid on limescale?

What mass of silver chloride will be recovered if excess sodium chloride is added to 0.500 L of solution containing 10.79 g of Ag⁺?