Chapter 8
In an equation, the symbol for a substance in water solution is followed by
(aq)
Write a balanced chemical equation for the following reaction: iron plus copper (I) nitrate yields iron (II) nitrate plus copper
Fe+2CuNO3>Fe(NO3)2+2Cu
According to the law of conservation of mass. the total mass of the reacting substances is
always equal to the total mass of the products
An element in the activity series can replace any element
below it on the list
When heated a metal carbonate decomposes into a metal oxide and a
carbon dioxide
Predict what happens when zinc is added to water
no reaction occurs
Which reaction does not occur
2 HF (aq) + Cl2 (g)> F2 (g) + 2 HCl (aq)
What is the balance equation when aluminium reacts with copper (II) sulfate
2Al+3CuSO4>Al2 (SO4) 3 + 3Cu
Tell what type of chemical reaction is represented by the following formula equation. Then balance the equation Ga(s) +S(s) >Ga2S3(s)
2Ga(s)+3S(s)> Ga2S3(s) Synthesis
use the activity series to determine if the following reaction is possible, if not explain 2K+ZnCl2>
2K+ZnCl2>Zn+2KCl this is because Zn is higher than K, so it pushes K out
Tell the type of chemical reaction is represented by the following formula equation Li(s) +H2O>LiOH(aq) +H2(g)
2Li(s)+2H2O(l)>2LiOH(aq) +H2(g) Single displacement
In order for the reaction 2Al+6HCl> 2AlCl3+3H2 to occur which of the following must be true
Al msut be above H on the activity series
Tell what type of chemical reaction is represented by the following formula equation. Then balance the equation C3H8(g)+ O2(g)> CO2(g)+ H2O(l)
C3H8(g)+ 5O2(g) >4H2O(l) Combustion
Complete the following equations CH4+O2>CO2+
CH4+2O2>CO2+2H2O
Predict what happens when calcium metal is added to a solution of magnesium chloride
Calcium chloride forms
use the activity series to determine if the following reaction is possible, if not explain Co(s)+Mg(NO3)2>
Co(s)+Mg(NO3)2> No reaction Because neither react with each other
complete and balance the following equation Fe2(SO4)3 +Ba(OH) 2
Fe2(SO4)3+3Ba (OH)2>2Fe(OH)3 +3Ba(SO4)
In writing a chemical equation that produces hydrogen gas, the correct representation of hydrogen gas is
H2
The formulas for the products of the reaction between sodium hydroxide and sulphuric acid are
Na2SO4 and H20
A double replacement reaction takes place when aqueous space Sn(NO3)2. You would expect one of these products of the reaction to be
NaNO3
In the word equation, sodium oxide +water > sodium hydroxide, the formula for sodium hydroxide is represented by
NaOH
What are the correct formulas and coefficents for the products of the following double replacement reaction RbOH+H3 PO4>
Rb3PO4 + 3H2O
The reaction represented by the equation 2Mg(s) +O2(g)> 2MgO (s) is a
Synthesis reaction
In double displacement reactions hydrogen chloride and sodium hydroxide react to produce sodium chloride. Another product is
Water
When a solid produced by a chemical reaction separates from the solution it is called
a precipitate
Which observation does not indicate that a chemical reaction has occurred?
change in total mass of substances
The equation AX>A+X is the general equation for a
decomposition reaction
The reaction represented by the equation 2HgO(s)>2Hg (l) +O2 (g) is
decomposition reaction
The equation AX+BY> AY + BX is the general equation for a
double displacement reaction
Active metals react with certain acids, such as hydrochloric acid, to yield a metal compound and
hydrogen
Group 1 metals react with water to produce metal hydroxides and
hydrogen
If metal X is lower than metal Y in the activity series, then metal X
loses electrons less readily than does metal Y
When a metal chlorate is heated it decomposes to yield a metal chloride and
oxygen
An active metal and a halogen react to form a
salt
When sodium chlorate, NaClO3, decomposes the products are
sodium chloride and oxygen
What kind of reaction do two or more substances combine to form a new compound
synthesis reaction
Many metal hydroxides decompose when heated to yield metal oxide and
water
