Chapter 8 SG
Which of the combinations of symbols and explanations is correct when used in a chemical equation?
(aq), dissolved in water
What are the missing coefficients for the skeleton equation below? Al2(SO4)3(aq) + KOH(aq) → Al(OH)3(aq) + K2SO4(aq)
1, 6, 2, 3
What coefficients would be needed to correctly balance the following equation? Au2O3(s) → Au(s) + O2(g)
2, 4, 3
When the equation Fe(s) + Cl2(g) → FeCl3 is balanced, what is the coefficient for Cl2?
3
Which of the following statements is true about a catalyst?
A catalyst is not used up in a chemical reaction.
In order for the reaction 2Al + 6HCl → 2AlCl3 + 3H2 to occur, which of the following must be true?
Al must be above H on the activity series.
Which of the following statements is true about what happens in all chemical reactions?
Bonds between atoms are broken as new bonds are formed.
Net ionic equations are primarily used for which of the 5 main types of chemical reactions?
Both Single Replacement and Double Replacement Reactions
Which of the following correctly displays the complete ionic equation for the reaction below. Ca(NO3)2(aq) + (NH4)2SO4(aq) → NH4NO3(aq) + CaSO4(s)
Ca2+(aq) + NO31-(aq) + NH41+(aq) + SO42-(aq) → NH41+(aq) + NO31-(aq) + CaSO4(s)
Which of the following correctly displays the net ionic equation for the reaction below. Ca(NO3)2(aq) + (NH4)2SO4(aq) → NH4NO3(aq) + CaSO4(s)
Ca2+(aq) + SO42-(aq) → CaSO4(s)
A precipitate always forms when two ionic solutions are mixed.
False
A spectator ion is directly involved in a reaction.
False
All chemical reactions fit uniquely into only one of the five main reaction categories.
False
When there are two or more reactants or products, they are separated by an arrow.
False
In the following chemical equation, identify the product(s): H2(g) + O2(g) --> H2O(l)
H2O
What does the symbol ( Δ ) written above the arrow in a chemical equation indicate?
Heat is supplied to the reaction
Why are most combustion reactions completed using hydrocarbons?
Hydrocarbons are capable of releasing very large amounts of heat.
Identify the precipitate formed in a reaction between aqueous ammonium silicate and francium sulfide.
No precipitate forms in this reaction.
Using your Solubility table: Will a mixture containing Potassium Sulfite form a Precipitate?
No, it will not form a precipitate
Which of the following is the correct skeleton equation for the reaction that takes place when solid phosphorus combines with oxygen gas to form diphosphorus pentoxide?
P(s) + O2(g) → P2O5(s)
If a combination reaction takes place between rubidium and bromine, the chemical formula for the product is ______.
RbBr
How can a spectator ion be identified within a complete ionic equation?
Spectator ions will be aqueous on both the reactant and products side of the equation.
Identify the precipitate formed in a reaction between aqueous cesium chromate and strontium bromide.
SrCrO4
Identify the spectator ions in the following equation. MgSO4(aq) + AgC2H3O2(aq) → Mg(C2H3O2)2(aq) + Ag2SO4(s)
The spectator ions are Mg2+ and C2H3O21-.
What determines whether a precipitate forms when two solutions of ionic compounds are mixed?
Their solubility
A net ionic equation does not show all of the ions present in a chemical reaction.
True
Atoms are not destroyed in most general chemical reactions.
True
Knowing the general types of reactions is important because it makes it possible to predict the products of some chemical reactions.
True
Which of the following statements is true about single-replacement reactions?
Two reactants produce two products.
Using your Solubility table: Will a mixture containing Silver Iodide form a precipitate?
Yes, it will form a precipitate
In every balanced chemical equation, each side of the equation has the same number of ________.
atoms of each element
What is an equation in which each side has the same number of atoms of each element?
balance equation
If a _____ is used to increase the rate of a chemical reaction, its formula is written above the arrow.
catalyst
A chemical reaction can be concisely represented by a ______.
chemical equation
When balancing an equation, you place ____ in front of reactants and products so that the number of atoms remains equal.
coefficients
Identify which of the following types of reactions is show below. C5H12 + 8O2 ---------> 5CO2 + 6H2O
combustion
An equation that shows dissolved Ionic compounds as their free ions is called a(n) ______.
complete ionic equation
Most ionic compounds ______________ when dissolved in water.
dissociate into ions
A ___________ reaction involves the exchange of ions between two compounds.
double-replacement
When mixing solutions of ions, it is possible to predict the formation of a precipitate using the _______.
ionic solubility rules
In accordance with the _________, a chemical equation must be balanced.
law of conservation of mass
A(n) ______ equation shows only the particles present that are involved in the reaction.
net ionic
Use the activity series of metals to complete a balanced chemical equation for the single-replacement reaction below. Ag(s) + KNO3(aq) →
no reaction takes place
By examining solubility, you can predict whether a(n) _____ forms during a reaction.
precipitate
Chemical reactions
produce new substances
In the chemical equation H2O2(aq) ----> H2O(l) + O2(g), the O2 is a _________.
product
The new substances formed in a chemical reaction are called the ______________.
products
The substances in a chemical reaction that undergo a chemical change are the _______________.
reactants
A net ionic equation
shows only those particles involved in the reaction.
What is a chemical equation that does not indicate the amounts of substances involved?
skeleton equation
This symbol ( ) indicates that ____.
the reaction is reversible
In order to predict whether or not a single-replacement reaction takes place, you need to consult a chart that shows ________.
the relative reactivity of metals
Many important chemical reactions take place in ___.
water
