Chemistry Test
a double-replacement reaction takes place when aqueous Na2CO3 reacts with aqueous Sn(NO3)2. You would expect one of the products of this reaction to be
NaNO3
----- is NOT true about what happens in all chemical reactions
New atoms are formed as products
--- is the correct skeleton equation for the reaction that takes place when solid phosphorus combines with oxygen gas to form diphosphorus pentoxide
P(s) + O(g) --> P5O2 (g)
--- is the balanced equation representing the decomposition of lead(IV) oxide
PbO2 ---> Pb + O2
what are the correct formulas and coefficients for the products of the following double-replacement reaction? RbOH + H3PO4 -->
Rb3PO4 + 3H2O
what is the driving force in the following reaction? Ni(NO3)2 (aq) + K2S(aq) --> NiS(s) + 2KNO3
a precipitate is formed
a list of metals in order of decreasing reactivity
activity series of metals
in order to predict whether or not a single-replacement reaction takes place, you need to consult a chart that shows the
activity series of metals
Which of the following statements is NOT correct
all chemical reactions can be classified as one of five general types
a concise representation of a chemical reaction
balanced equation
an equation in which each side has the same number of atoms of each element
chemical equation
symbols used in equations, together with explanations of the symbols are shown below. ---- is correct
(aq), dissolved in water
AlCl3 + NaOH --> Al(OH)3 + NaCl what are the coefficients
1, 3, 1, 3
N2 + H2 --> NH3. what coefficients will balance the skeleton equation?
1, 3, 2
what are the missing coefficients? Al2(SO4)3 + KOH --> Al(OH)3 + K2SO4
1,6,2,3
KClO3 ---> KCl +O2 what is the coefficient of KClO3?
2
Mg + HCl ---> MgCl2 + H2. What is the coefficient for HCl?
2
Fe + Cl2--> FeCl3. what is the coefficient of Cl2?
3
nitrogen trifluorine --> nitrogen + fluorine. What will the coefficient and symbol for fluorine be?
3F2
Cr + Fe(NO3)2 --> Fe + Cr(NO3)3.what are the missing coefficients?
4,6,6,2
in order for the reaction 2Al + 6HCl --> 2AlCl3 + 3H2 to occur, what must be true
Al must be above H on the activity series
what is the balanced chemical equation for the reaction that takes place between bromine and sodium iodide?
Br2 + 2NaI --> 2NaBr + I2
---- is the correctly balanced equation for the incomplete combustion of heptene, C7H14
C7H14 + 7O2 --> 7CO + 7H2O
the complete combustion of which of the following substances produces carbon dioxide and water?
C8H18
a double-replacement reaction takes place when aqueous cobalt (III) chloride reacts with aqueous lithium hydroxide. one of the products of this reaction is
Co(OH)3
2C2H7OH + 9O2 --> 6CO2 + 8H2O is an example of which type of reaction?
combustion
a reaction in which oxygen reacts with another substance, often producing heat or light
combustion reaction
a reaction in which a single compound is broken down into simpler substances
decomposition reaction
Chemical equations _____
describe chemical reactions
H3PO4 + 3KOH ---> K3PO3 + 3H2O is an example of which reaction?
double-replacement reaction
everyday equations describes
everyday processes
what does the symbol ^ (triangle) in a chemical equation mean?
heat is supplied to the reaction
the products of a combustion reaction do NOT include
hydrogen
Ag + KNO3 --->
no reaction takes place because silver is less reactive than potassium
a catalyst is
not used up in a reaction
in the activity series of metals, which metal(s) will displace hydrogen from an acid
only metals above hydrogen
in a combustion reaction, one of the reactants is
oxygen
chemical reactions
produce new substances
a new substance formed in a chemical reaction
product
a starting substance in a chemical reaction
reactant
in a double-replacement reaction, the
reactants are two ionic compounds
Mg + 2HCl --> MgCl2 +H2 is an example of which type of reaction?
single-replacement
a reaction in which the atoms of one element replace the atoms of a second element in a compound
single-replacement reaction
a chemical equation that does not indicate relative amounts of reactant and products
skeleton equation
chemical equations must be balanced to satisfy
the law of conservation of mass
----- is NOT true about the decomposition of a simple binary compound
the products are unpredictable
----- is NOT true about double-replacement reactions
the reactant may be a solid metal
in a double-replacement reaction
the reactants are generally two ionic compounds in aqueous solution
a skeleton equation does NOT show
the relative amounts of reactants and products
---- is true about single-replacement reactions
two reactants produce two products