Chemistry
Which of the following combinations of symbol and explanation of symbol is correct when used in a chemical equation?
(aq), dissolved in water
In the chemical equation H2O2(aq) → H2O(l) O2(g), the O2 is a ____..
. product
What are the coefficients that will balance the skeleton equation below?AlCl3 + NaOH2→ Al(OH)3+NaCl
1,3,1,3
What are the coefficients that will balance the skeleton equation below?N2 + H2 → NH3
1,3,2
What are the missing coefficients for the skeleton equation below?Al2(SO^4)3(aq) KOH(aq) → Al(OH)3(aq) K^2SO4(aq)
1,6,2,3
When the equation KClO3(s) → KCl(s) + O2(g) is balanced, the coefficient of KClO3 is
2
When the following equation is balanced, what is the coefficient for HCl?Mg(s) HCl(aq) → MgCl2(aq) H2(g)
2
What are the missing coefficients for the skeleton equation below?Cr(s) Fe(NO3)2(aq) → Fe(s) Cr(NO3)3(aq)
2,3,3,2
Complete and balance the following equation. Al+Cl2
2Al+3Cl2=2AlCl3
Balance the following equation. Au2O3→ Au+O2
2Au2O3=4Au+3O2
Complete and balance the following equation and indicate the precipitate, if any: K3PO4(aq)+BaCl2(aq)
2K3PO4(aq)+3BaCl2(aq)=Ba3(PO4)2(s)+6KCl(aq)
When potassium hydroxide and barium chloride react, potassium chloride and barium hydroxide are formed. The balanced equation for this reaction is
2KOH BaCl2 <ιμγ ωιδτη="15" ηειγητ="15" αλιγν="βοττομ" αλτ="μχ042-9.ϕπγ" σρχ="ηττπσ://ωεστχλαρκ.σχηοολογψ.χομ/σψστεμ/φιλεσ/ατταχημεντσ/παγε_εμβεδσ/μ/2020-02/μχ042-9_5ε4ε8α5φ99φαε.ϕπγ" βορδερ="0"> 2KCl Ba(OH)2
Balance the following equation. Indicate the states of the products. Na3PO4(aq) +ZnSO4(aq) → Na2SO4 +Zn3(PO4)2
2Na3PO4+3ZnSO4=3Na2SO4(aq)+Zn3(PO4)2(s)
Balance the following equation. NaCl3O→ NaCl O2
2NaClO3=2NaCl+3O2
When the equation Fe Cl2 → FeCl3 is balanced, what is the coefficient for Cl2?
3
Rewrite the following word equation as a balanced chemical equation. What is the coefficient and symbol for fluorine?nitrogen trifluoride → nitrogen fluorine
3F2
Balance the following equation. Mg H3PO4→ Mg3(PO4)+H2
3Mg2H3PO4=Mg3(PO4)2+3H2
Balance the following equation. Ba+H2O → Ba(OH)2+H2
Ba+2H2O=Ba(OH)2+H2
Predict the precipitate that forms when aqueous solutions of silver nitrate and potassium chloride react to form products in a double-replacement reaction. Include a discussion of how to write the complete chemical equation describing this reaction.
Because the reaction is a double-replacement type, cations are exchange among compounds during the reaction. The first step is to write the equation in skeletal form: AgNO3(aq)+KCl(aq)=AgCl(s)+KNO3(aq) (balanced)Over looking on this equation shows that the insoluble precipitate silver chloride forms in an aqueous solution of potassium nitrate. The relative amounts of elements are the same on either side of the equation:AgNO3(aq)+KCl=AgCl(s)+KNO3(aq) (balanced)
Which of the following statements is true about what happens in all chemical reactions?
Bonds between atoms are broken and new bonds are formed.
Balance the following equation. Indicate whether combustion is complete or incomplete. 2C2H5OH+ O2→ CO2+H2O
C2H5OH+3O2=2CO2+3H2O
Balance the following equation. C3H6+ O2 →CO+H2O
C3H6+3O2=3CO+3H2O
The complete combustion of which of the following substances produces carbon dioxide and water?
C8H18
Complete and balance the following equation. CH4+ O2=CO2+
CH4+2O2=CO2+2H2O
Write the net ionic equation for the following reaction and indicate the state of the products. Ca(NO3)29(aq)+(NH4)2SO4(aq)
Ca^2+(aq)++SO4^2-(aq)=CaSO4(s)
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
Complete and balance the following equation. Fe2(SO4)3+Ba(OH)2
Fe2(SO4)3+3Ba(OH)2=2Fe(OH)3+3BaSO4
Write a balanced net ionic equation for the following reaction. H3PO4(aq)+NaOH(aq) → Na3PO4(aq)+H2O(l)
H+(aq)+OH-(aq)=H2O(l)
Which of the following statements is correct?
Incomplete combustion of a hydrocarbon may produce carbon monoxide and water.
One of the products when aqueous Na2CO3 reacts with aqueous Sn(NO3)2 is
NaNO3
Use the activity series of metals to complete a balanced chemical equation for the following single replacement reaction.Ag(s) KNO3(aq) →
No reaction takes place because silver is less reactive than potassium.
In a combustion reaction, one of the reactants is
Oxygen
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)
Which of the following is a 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
If a combination reaction takes place between rubidium and bromine, the chemical formula for the product is _
RbBr
Which of the following statements is true about the decomposition of a simple binary compound?
The reactant is a single substance.
Which of the following statements is true about single-replacement reactions?
Two reactants produce two products.
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.
In every balanced chemical equation, each side of the equation has the same number of ____.
atoms of each element
Which of the following is the correctly balanced equation for the incomplete combustion of heptene, C7H14?
b. C7H14+ 7O <ιμγ ωιδτη="15" ηειγητ="15" αλιγν="βοττομ" αλτ="μχ048-13.ϕπγ" σρχ="ηττπσ://ωεστχλαρκ.σχηοολογψ.χομ/σψστεμ/φιλεσ/ατταχημεντσ/παγε_εμβεδσ/μ/2020-02/μχ048-13_5ε4ε8α6326464.ϕπγ" βορδερ="0"> 7CO +7H2O
an equation in which each side has the same number of atoms of each element
balanced equation
a concise representation of a chemical reaction
chemical equation
The equation 2C3H7OH+9O2→ 6CO2+ 8H2O is an example of which type of reaction?
combustion reaction
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
The equation H3PO4+3KOH → K3PO3+3H2O is an example of which type of
double-replacement reaction
In a double-replacement reaction, one of the products
may precipitate from solution.
In the activity series of metals, which metal(s) will displace hydrogen from an acid?
only metals above hydrogen
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.
A skeleton equation shows just the reactants and products whereas a balanced equation shows the
relative amounts of reactants and products.
A net ionic equation
shows only those particles involved in the reaction.
The equation Mg(s) 2HCl(aq) → MgCl2(aq) H2(g) is an example of which type of reaction?
single-replacement reaction
The type of reaction that takes place when one element reacts with a compound to form a new compound and a different element is a _
single-replacement reaction
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 reactants and products
skeleton equation
Chemical equations must be balanced to satisfy
the law of conservation of mass.
This symbol () indicates that
the reaction is reversible
In order for the reaction 2Al 6HCl → 2AlCl 3H to occur, which of the following must be true?
Al must be above H on the activity series.
What does the symbol Δ above the arrow in a chemical equation mean?
Heat is supplied to the reaction.
A catalyst is
not used up in a reaction.
Balance the following equation. (NH4)2CO3+ NaOH → Na2CO3+ NH3+ H2O
(NH4)2CO3+2NaOH=Na2CO3
What is the balanced chemical equation for the reaction that takes place between bromine and sodium iodide?
Br2+ 2NaI → 2NaBr+I2
The reaction 2Fe 3Cl→ 2FeCl is an example of which type of reaction?
combination reaction
Chemical equations
describe chemical reactions.
In a double-replacement reaction,
the reactants are generally two ionic compounds in aqueous solution.
The products of a combustion reaction include
water, carbon dioxide, and carbon monoxide.
