Naming precipitates

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1. Solutions of clear solutions of lead nitrate and potassium iodide were mixed as shown on the video on the right.
The balanced overall equation for this reaction is
 
A) Pb(NO3)2(aq) + 2KI(aq) => 2KNO3(aq) + PbI2(s)
B) Pb(NO3)2(aq) + KI2(aq) => 2KNO3(aq) + PbI2(aq)
C) Pb(NO3)2(s) + 2KI(s) => 2KNO3(s) + PbI2(s)
D) Pb(NO3)(aq) + KI(aq) => KNO3(aq) + PbI(s)
E) Pb(NO3)2(aq) + K2I(aq) => 2KNO3(aq) + PbI2(s)

2. Solutions of potassium hydroxide and copper(II) nitrate were mixed in a test tube to form a coloured precipitate.
Which one of the following represents the balanced chemical equation for this reaction.
 
A) Cu(NO3)2(aq) + 2KOH => Cu(OH)2(aq) + 2KNO3(s)
B) Cu(NO3)2(aq) + 2KOH => Cu(OH)2(s) + 2KNO3(aq)
C) Cu(NO3)2(aq) + KOH => Cu(OH)2(s) + KNO3(aq)
D) Cu(NO3)2(aq) + KOH => Cu(OH)2(aq) + KNO3(s)
E) Cu(NO3)2(aq) + KOH => CuOH(s) + KNO3(s)

3. Solutions of copper(II) sulfate and sodium hydroxide react to produce solid copper hydroxide and sodium sulfate.
Which one of the options below represents the equation to this reaction?
 
A) Cu2SO4(aq) + 4NaOH(aq) => 2Cu(OH)2(s) + Na4SO4(aq)
B) CuSO4(aq) + 2NaOH(aq) => Cu(OH)2(s) + Na2SO4(aq)
C) CuSO4(aq) + NaOH(aq) => CuOH(s) + NaSO4(aq)
D) Cu2SO4(aq) + NaOH(aq) => Cu(OH)2(s) + NaSO4(aq)
E) CuSO4(aq) + Na(OH)2(aq) => Cu(OH)2(s) + Na2SO4(aq)

4. Solutions of silver nitrate and sodium carbonate were mixed as shown on the video on the right.
The balanced overall equation for this reaction is
 
A) 2AgNO3(aq) + Na2CO3(aq) => 2Ag2CO3(aq) + NaNO3(aq)
B) 2AgNO3(aq) + Na2CO3(aq) => Ag2CO3(aq) + 2NaNO3(s)
C) AgNO3(aq) + Na2CO3(aq) => Ag2CO3(aq) + NaNO3(s)
D) AgNO3(aq) + Na2CO3(aq) => Ag2CO3(s) + NaNO3(aq)
E) 2AgNO3(aq) + Na2CO3(aq) => Ag2CO3(s) + 2NaNO3(aq)

5. A solution of sodium carbonate is mixed with copper(II) nitrate to form solid copper carbonate and soluble sodium nitrate.
Which one of the following chemical equations represents the balanced overall equation for this reaction?
 
A) Cu(NO3)2(aq) + Na2CO3(aq) => CuCO3(s) + NaNO3(aq)
B) Cu(NO3)2(aq) + Na2CO3(aq) => CuCO3(s) + 2NaNO3(aq)
C) CuNO3(aq) + NaCO3(aq) => CuCO3(aq) + NaNO3(aq)
D) Cu(NO3)2(aq) + Na2CO3(aq) => CuCO3(aq) + 2NaNO3(aq)
E) Cu(NO3)3(aq) + Na2CO3(aq) => CuCO3(s) + 3NaNO3(aq)

6. Ammonia (NH3) reacts with oxygen (O2) to produce water (H2O) and nitrous oxide (NO).
Which option below represents a balanced chemical equation for this reaction?
 
A) 3NH3 + 5O2 => 6H2O + 3NO
B) 4NH3 + 3O2 => 3H2O + 4NO
C) NH3 + O2 => H2O + 4NO
D) 4NH3 + 5O2 => 6H2O + 4NO
E) NH3 + O2 => 6H2O + NO

7. Bromine gas (Br2) reacts with ammonia gas(NH3) to form solid ammonium bromide(NH4Br) and nitrogen gas (N2).
Which one of the following options below represents a balanced chemical equation for the reaction?
 
A) 3Br2 + 8NH3 => 6NH4Br + N2
B) 2NH4Br + N2 => 3Br2 + 8NH3
C) 4Br2 + 8NH3 => 6NH4Br + 2N2
D) Br + N2H3 => NH2Br + N
E) 6NH4Br + N2 => 3Br2 + 8NH3

8. Calcium metal(Ca) reacts with oxygen gas(O2) to form calcium oxide(CaO).
Which one of the options below best represents the chemical equation for this reaction?
 
A) 2Ca + O2 => 2CaO
B) 2C + O2 => 2CaO2
C) 2CaO2 => 2Ca + O2
D) Ca + O2 => CaO
E) O2 => 2CaO2 + 2Ca

9. Concentrated lead nitrate(Pb(NO3)2) solution is added to a dilute solution of sulfuric acid(H2SO4) producing solid lead sulfate (PbSO4) and soluble nitric acid(HNO3).
Which option below represents the balanced chemical equation for this reaction?
 
A) Pb(NO3)2(aq) + H2SO4(aq) => PbSO4(s)) + HNO3(aq)
B) Pb(NO3)2(aq) + H2SO4(aq) => PbSO4(s)) + 2HNO3(aq)
C) PbSO4(s)) + HNO3O(aq) => Pb(NO3)2(aq) + H2SO4(aq)
D) Pb(NO3)(aq) + H2SO4(aq) => PbSO4(s)) + 2HNO3(aq)
E) None of the above

10. Methane(CH4) burns in oxygen (O2) to produce carbon dioxide(CO2) and water(H2O).
Which one of the following options represents a balanced chemical equation for this reaction?
 
A) CH4 + O2 => CO2 + H2O
B) 3CH4 + 5O2 => 3CO2 + 6H2O
C) C2H4 + 3O => C2O2 + H4O
D) CH4 + 3O => CO2 + H4O
E) CH4 + 2O2 => CO2 + 2H2O

(c) Dynamic Science