Chapter 11 chemistry test
Cl2 + H2 → 2HCl In the reaction above,
1 and 2
indicating that H2 contains two hydrogen atoms.
2
General Activity Series For Metals most active Li Ca Na Mg Al Zn Fe Pb [H2] Cu Ag Pt least active The activity series is given above. Which of the following reactions cannot happen?
2Ag + 2HCl → 2AgCl + H2
KBr + AgNO3 → KNO3 + AgBr Zn + 2HCl → H2 + ZnCl2 MgCO3 → MgO + CO2 2Fe(OH)3 → Fe2O3 + 3H2O Na2CO3 + Ca(OH)2 → CaCO3 + 2NaOH AgNO3 + HCl → AgCl + HNO3 Out of the chemical equations above, how many is (are) considered as a double replacement reaction? __
3
Fill in the missing coefficients to balance the chemical equation below. NH3 + O2 → 4NO + 6H2O
3,2
What is/are the product(s) of a complete combustion reaction?
A and b
A single replacement reaction occurs when
All of the above
In a chemical reaction, the reactant undergoes
All of the above
Which of the following metals cannot replace hydrogen in HCl?
All of the above
Which of the following is the correct chemical equation for the combustion of methane (CH4)?
CH4 + 2O2 → CO2 + 2H2O
The most reactive halogen is
Fluorine
What is the product of the combustion of hydrogen?
Hydrogen only
Is CH4+2O2→CO2+2H2O a combination reaction?
No
Which is the correctly balanced decomposition reaction for silver oxide?
No
If a spoon of copper metal is placed in a solution of ferrous sulfate
No reaction will take place
What must be a reactant for a chemical reaction to qualify as combustion
Oxygen
Decomposition reactions form:
Simpler compounds from a complex compound
What is the product of the combustion of hydrogen?
Water only
Which of the following rules should you follow to balance chemical equations?
add coefficients as needed
A chemical _____ is a written method of representing the changes that occur in a chemical reaction
atom, element(any of these
2HgO → 2Hg + O2 The reaction above is classified as
decomposition
CaCO3 → CaO + CO2 The reaction above is classified as
decomposition
The chemical reaction in which ammonium sulfate and potassium hydroxide are mixed together is called
double displacement
2NO+O2→2NO2 What type of chemical reaction is shown above?
synthesis
CO2 + H2O → H2CO3 The reaction above is classified as
synthesis
The chemical reaction below in which solid calcium oxide is treated liquid water is an example of what type of reaction CaO(s) + H2O (l) → Ca(OH)2 (aq)
synthesis
According to the description below: "Potassium sulfide is reacted with nitric acid." Identify the type of the reaction
Double displacement
Chemical reactions yield _____.
Products
S + O2 → SO2 The reaction above is classified as __
Synthesis
SECOND TRY Which group of coefficients balances the following chemical equation? 2KClO3 → ___ KCl + ___ O2
2, 3
Metal hydroxides often decompose into _____ and ____.
a metal oxide and water
P + O2→ P4O6
4 and 3
Which of the following chemical equations is balanced?
4Fe+3O2→2Fe2O3
What is the reverse of a combination reaction?
A decomposition reaction
Which of the following statements is true?
A metal in the reactivity series can displace any metal below it in the series
Which of the following is NOT a decomposition reaction?
Al(s)+HCl(aq)→AlCl3(aq)+H2(g
Which chemical equation is balanced as written?
CuCO3(s)→CuO(s)+CO2(g)
A ——————— reaction in which a substance breaks down to form two or more substances
Decomposition
According to the description below: "Calcium carbonate is heated to breakdown." Identify the type of the reaction
Decomposition
The chemical reaction in which copper oxide and sulfuric acid are mixed together is called
Double displacement
What happens when a fuel such as coal is heated to a high temperature in the presence of oxygen gas?
Energy is released as heat which can then be used
What happens when a fuel such as coal is heated to a high temperature in the presence of oxygen gas
Energy is released as heat which can then be used.
An element may undergo a chemical decomposition reaction
False
Which of the following is NOT a combustion reaction?
NO(g)+O3(g)→NO2(g)+O2(g)
Which of the following is the balanced equation for the synthesis of sulfuric acid (H2SO4)?
SO3 + H2O→ H2SO4
When one element replaces another element the reaction is known as a replacement reaction
Single
Ca(s) + 2HNO2 (aq) → Ca(NO2)2 (aq) + H2 (g) What type of chemical reactions is the chemical reaction described above
Single displacement
A combination reaction is also known as a synthesis reaction.
TRUE
Balancing chemical equations is accomplished by changing coefficients
TRUE
Once the formulas for the reactants and the products are determined, the subscripts may not be changed.
TRUE
Two compounds reacting to form another compound can qualify as a combination reaction
TRUE
Two or more chemical species combine to form a more complex product in a synthesis reaction.
TRUE
At least one of the products of a double-replacement reaction is a ____
any of the above
A chemical equation is balanced when the number of each type of _____ is the same on both sides of the equation
atom, element(any of these
What products are always made when any carbon-based fuel is burned in the presence of oxygen
carbon dioxide and water
Into what does a binary compound often decompose?
its component elements
A compound or material formed by a chemical reaction is known as the Reactants of that reaction.
product
Which chemical(s) are reactants in the following chemical equation? C + O2 → CO2
C O2
Which metal can replace iron in a single-replacement reaction?
chromium
N2 + 3H2 → 2NH3 Substance N2 H2 NH3 Molecules Present (Coefficient)
1,3,2
Which of the following might be included in a chemical reaction?
All of the above
Reactions in which two or more substances combine to form a new substance are referred to as
Combinations reactions
Any metal above hydrogen in the activity series will replace hydrogen in water.
False
Silver exposed to sulfur turns black. The compound formed is _____ and is commonly referred to as tarnish
silver sulfide
3C(s) + 2Fe2O3 (s) → 4Fe (s) + 3CO2 (g) What type of chemical reactions is the chemical reaction described above?
single displacement
Which coefficient placed before HCl will balance the following equation? Zn+HCl→ZnCl2+
2
Aluminum metal will replace copper in a solution of copper(II) nitrate. Which is the correct balanced equation?
2Al(s) + 3Cu(NO3)2 (aq) → 2Al(NO3)3 (aq) + 3Cu(s)
Which of the following is the balanced equation for the combustion of carbon monoxide (CO) in oxygen
2CO + O2 → 2CO2
Which of the following chemical reactions produces water via a synthesis reaction?
2H2 + O2 → 2H2O
Which of the following equations is balanced?
2H2+O2→2H2O
Fill in the missing coefficients to balance the chemical equation below. NH3 + O2 → 4NO + 6H2O
4,5
When the equation below is balanced using the smallest whole number coefficients, what is the sum of all the coefficients? If a molecule would have no coefficient, count it as 1.____C2H4(g)+____O2(g)→_____CO2(g)+____H2O(l)
8
KBr (aq) + AgNO3 (aq) → KNO3 (aq) + AgBr (s) In the chemical reaction above, what state is KBr in?
Aqueous
Below is a skeleton equation representing the combustion of ethanol in pure oxygen. C2H6O+O2→H2O+CO2 Which of the following is the balancedequation for the combustion of ethanol (C2H6O) in pure oxygen?
C2H6O + 3O2 → 3H2O + 2CO2
"Carbon dioxide gas reacts with liquid water to produce aqueous carbonic acid." Which chemical equation correctly translates the description above
CO2 (g) + H2O (l) → H2CO3 (aq)
According to the description below: "Sodium hydroxide is reacted with copper (II) sulfate." The described chemical reaction should be classified as
Double displacement
Identify the type of reaction occurring based on the description below: "Sodium hydroxide reacts with iron (III) chloride." What type of reaction is this?
Double displacement
In the activity series, if the free element is below the element to be replaced in the compound, then the reaction will occur
False
In the activity series, if the free element is below the element to be replaced in the compound, then the reaction will occur.
False
True or False: Given the activity series above, when a piece of silver is dropped into a container of hydrochloric acid, the reaction will take place, and produce hydrogen gas.
False
True or False: In a decomposition reaction, two or more substances are formed. Therefore, NaOH + NH4Cl → NaCl + NH3 + H2O is an example of decomposition reaction.
False
What is a precipitate
Insoluable Ionic Compund
What energy can be used for a decomposition reaction to take place
Light, Heat, electricity
Ammonium chloride + Potassium hydroxide → Potassium chloride + Ammonia gas + Water Which of the following chemical reactions correctly interprets the chemical word equation above
NH4Cl (aq) + KOH (aq) → KCl (aq) + NH3(g) + H2O (l)
General Activity Series For Metals most active Li Ca Na Mg Al Zn Fe Pb [H2] Cu Ag Pt least active The activity series is given above. When a piece of iron is dropped into a container of zinc chloride solution, what is the correct chemical reaction
No reaction
The materials or compounds converted into new compounds in a chemical reaction are known as
Reactants
Tin metal reacts with hydrochloric acid. Which is the correct balanced equation
Sn(s)+2HCl(aq)→SnCl2(aq)+H2(g)
CaCO3 (s) + 2HCl (aq) → CaCl2 (aq) + CO2 (g) + H2O (l) In the chemical reaction above, what states are CaCO3 and H2O in, respectively
Solid, Liquid
What will happen when a less reactive metal is added to a metal salt solution?
There will be no reaction
An activity series chart helps compare reactivity among elements.
True
Chemical decomposition converts a chemical compound into elements or simpler compounds.
True
Combustion reactions release large amounts of energy as heat and/or light
True
In the activity series of metal, metals from lithium to copper can combine easily with oxygen to form their oxides
True
In the activity series of metal, metals from lithium to copper can combine easily with oxygen to form their oxides.
True
True or False: 2SO2 + O2 → 2SO3 In the chemical reaction above, the coefficient of SO3 is 2
True
2C6H6 + 15O2 → 12CO2 + 6H2O The reaction above is classified as ___ .
Water and carbon dioxide
What are the products of any combustion reaction involving a hydrocarbon?
Water and carbon dioxide
What is the "major drawback" to using word equations?
Word equations are not quantitative
Can a metal and a nonmetal participate in a combination reaction
Yes, forming an ionic compound
Which of the following is NOT a double-replacement reaction?
Zn+Cu(CH3COO)2→Zn(CH3COO)2+Cu
In the expression 3H2O, the 3 is a _____, while the 2 is a _____.
coefficient; subscript
Complete the sentence by using wordvariable, coefficients or constants. To balance a chemical equation, numbers called _____ are used
coefficients
What type of substance typically participates in double-replacement reactions?
ionic compounds in aqueous solution
The three general categories of single-replacement reactions are:
metal, hydrogen, halogen
In most single-replacement reactions, a metal atom replaces a _____ atom in a compound, while a nonmetal atom replaces a _____ atom in a compound
metal; nonmetal
The process of burning means to react a substance with _____.
oxygen
What type of reaction is shown below? Mg + 2HCl → MgCl2 + H2
single displacement
An equation that shows only the chemical formulas without anything to indicate relative amounts is called a _____.
skeleton equation
Given the word equation below:sodium + water → sodium hydroxide + hydrogenWhat are the reactant(s)?
sodium and water
In the formation of sodium chloride by the combination of sodium and chlorine:
sodium loses electrons but chlorine gains electrons
What is indicated by a letter in parentheses after a chemical formula, such as (s)?
the physical state of the substance
Which is NOT a chemical reaction?
water seeping through a pot of soil