WorksheetsUnit 6 Quiz Review
Total questions: 14
Worksheet time: 24mins
What coefficient should go in the blank space to balance the chemical equation?
2Al +____ HCl → 2AlCl3 + 3H2
2
4
3
6
What is the coefficient for water in the balanced chemical reaction?
__ Na + __ H2O --> __ NaOH + __ H2
2
4
1
3
What coefficients are needed in the reaction below to follow the Law of Conservation of Mass?
Al2O3 ---> Al + O2
A coefficient 4 should be placed in front of the aluminum oxide and another 2 in front of the aluminum product.
A coefficient 4 should be placed in front of the aluminum oxide and another 4 in front of the aluminum product.
A coefficient 2 should be placed in front of the aluminum oxide and another 2 in front of the aluminum product.
A coefficient 2 should be placed in front of the aluminum oxide and another 4 in front of the aluminum product.
Which of the following reactions shows a precipitation reaction?
CH4 (g) + 2O2 (g) --> CO2 (g) + 2H2O (l)
2HCl (aq) + Ca(OH)2 (aq) --> CaCl2 (aq) + 2H2O (l)
CuCl2 (aq) + 2 AgNO3 (aq) --> Cu(NO3)2 (aq) + 2 AgCl (s)
2Fe (s) + O2 (g) --> Fe2O3 (s)
Predict the products for the reactants below and justify your reasoning:
Mg + CuCl →
MgCl2 + Cu because metals replace metals
MgCu + Cl because metals replace nonmetals
MgCu + Cl2 because metals replace nonmetals
MgCl + Cu because metals replace metals
Which element will silver (Ag) replace in the equation below:
AgNO3 + HCl -->
Silver will replace H because H is acting as a cation in HCl.
Silver will replace H because H is a metal.
Silver will replace Cl because Cl is a nonmetal.
Silver will replace Cl because Cl is acting as a cation in HCl.
Which of the following is most likely the identity of unknown element X?
X + CaCl2 --> Ca + XCl2
Mg, because it is in the same period as Cl
Fe, because it is in the same period as Ca
Ba, because it loses the same number of electrons as Ca
I, because it loses the same number of electrons as Cl
Gold sulfide (Au2S3) reacts with an unknown element as shown in the general:
Au2S3 + X ➔ Au + X2S
What is the identity of element X in the reaction shown?
Magnesium, because it has an oxidation number of -2.
Magnesium, because it has an oxidation number of +2.
Potassium, because it has an oxidation number of -1.
Potassium, because it has an oxidation number of +1.
Use the reaction to answer the following question.
Cu+ AgNO3 -->
In a single displacement reaction between Cu and AgNO3, which statement BEST explains the products formed?
Copper (Cu) replaces silver (Ag) because they are both metals and have positive oxidation numbers.
Copper (Cu) replaces silver (Ag) because they are both metals and have negative oxidation numbers.
Copper (Cu) replaces silver (Ag) because they are both nonmetals and have positive oxidation numbers.
Copper (Cu) replaces silver (Ag) because they are both nonmetals and have negative oxidation numbers.
Use the information and chemical equation to answer the following question. A team of chemists discovers a new chemical reaction.
2Na + 2H2O --> 2NaOH + H2
Which type of reaction will this equation be classified as?
Synthesis because more complex substances are being made
Decomposition because H2O breaks apart
Single Replacement because one of the Na is replacing H
Double Replacement because Na and H are changing places (double swap)
When the equation is balanced, what coefficient is needed for sodium bromide (NaBr):
2 NaF + Br2 ---> ____ NaBr + F2
1
3
2
4
The following is what type of reaction:
CH4 + Br2 --> CH3Br + HBr
Which type of reaction will this equation MOST LIKELY be classified as?
Synthesis because more complex substances are being made.
Combustion because a hydrocarbon (CH4) is the reactant.
Single Replacement because one of the H is switching Br.
Double Replacement because Br and H are switching in a double swap.
What mass of smoke is expected to be produced in the reaction?
31 kg because mass cannot be created or destroyed
31 kg because the mass of the products must equal the mass of the reactants
3 kg because mass is created to form the products
3 kg because the mass of the products must equal the mass of the reactants
