Homework #5, Chapter 4

Balance this reaction. If a coefficient is one, enter "1" explicitly. _____N2+_____H2---->____NH3

1, 3, 2

Balance this reaction. If a coefficient is one, enter "1" explicitly. ___CH4 + ___O2 ----> ___CO2 + ___H2O

1,2,1,2

Balance this combustion reaction. If a coefficient is 1, include it explicitly. ____ C6H5OH+ ____O2 → ____CO2 + ____H2O

1,7,6,3

Balance this reaction. If a coefficient is one, enter "1" explicitly. ___C2H6 + ___O2 ----> ___CO2 + ___H20

2 7 4 6

Which chemical equation is an example of a decomposition reaction? 2H3PO4 + 3Ca(OH)2 → 6H2O + Ca3(PO4)2 C2H5OH + 3O2 → 2CO2 + 3H2O 2 C7H5N3O6 → 3 N2 + 5 H2O + 7 CO + 7 C Ba + H2SO4 → BasO4 + H2 Fe2O3 + 3SO3 → Fe2(SO4)3

2 C7H5N3O6 → 3 N2 + 5 H2O + 7 CO + 7 C

Balance this reaction. If a coefficient is one, enter "1" explicitly. ___HCl + ___Ca(OH)2 ----> ___ H2O + ___CaCl2

2,1,2,1

Balance this combustion reaction. ___ C4H10 + ___ O2 → ___ CO2 + ___ H2O

2,13,8,10

Which chemical equation is an example of a neutralization reaction? 2 C7H5N3O6 → 3 N2 + 5 H2O + 7 CO + 7 C Ba + H2SO4 → BasO4 + H2 C2H5OH + 3O2 → 2CO2 + 3H2O 2H3PO4 + 3Ca(OH)2 → 6H2O + Ca3(PO4)2 Fe2O3 + 3SO3 → Fe2(SO4)3

2H3PO4 + 3Ca(OH)2 → 6H2O + Ca3(PO4)2

Which chemical equation is an example of a decomposition reaction? CH4 + 2O2 → 2CO2 + 2H2O Zn + 2HCl → ZnCl2 + H2 2KClO3 → 2KCl + 3O2 2Na + Cl2 → 2NaCl HCl + NaOH → NaCl + H2O

2KClO3 → 2KCl + 3O2

Which chemical equation is an example of a composition reaction? 2KClO3 → 2KCl + 3O2 HCl + NaOH → NaCl + H2O Zn + 2HCl → ZnCl2 + H2 2Na + Cl2 → 2NaCl CH4 + 2O2 → 2CO2 + 2H2O

2Na + Cl2 → 2NaCl

Balance this reaction. If a coefficient is one, enter "1" explicitly. ___SO3 + ___Fe2O3 ----> ___Fe2(SO4)3

3,1,1

Balance this reaction. If a coefficient is one, enter "1" explicitly. ___P + ___O2 ----> ___P2O5

4,5,2

Which chemical equation is an example of a combustion reaction? 2H3PO4 + 3Ca(OH)2 → 6H2O + Ca3(PO4)2 Ba + H2SO4 → BasO4 + H2 2 C7H5N3O6 → 3 N2 + 5 H2O + 7 CO + 7 C Fe2O3 + 3SO3 → Fe2(SO4)3 C2H5OH + 3O2 → 2CO2 + 3H2O

C2H5OH + 3O2 → 2CO2 + 3H2O

Which chemical equation is an example of a combustion reaction? Zn + 2HCl → ZnCl2 + H2 2Na + Cl2 → 2NaCl 2KClO3 → 2KCl + 3O2 CH4 + 2O2 → 2CO2 + 2H2O HCl + NaOH → NaCl + H2O

CH4 + 2O2 → 2CO2 + 2H2O

Assuming that a double-replacement reaction occurs, what are the products that are formed? Do not include phase labels, but make sure your products are balanced. CrSO4 + PbCl2 → _______

CrCl2+PbSO4

***WRONG Assuming that a single-replacement reaction occurs, what are the products that are formed? Do not include phase labels, but make sure your products are balanced. CrBr4 + 2Cl2 →

CrCl4+2Br2

Which chemical equation is an example of a composition reaction? C2H5OH + 3O2 → 2CO2 + 3H2O 2H3PO4 + 3Ca(OH)2 → 6H2O + Ca3(PO4)2 2 C7H5N3O6 → 3 N2 + 5 H2O + 7 CO + 7 C Ba + H2SO4 → BaSO4 + H2 Fe2O3 + 3SO3 → Fe2(SO4)3

Fe2O3 + 3SO3 → Fe2(SO4)3

Write the formula of the salt formed by the neutralization of iron(III) hydroxide and hydrofluoric acid.

FeF3 (HF+Fe(OH)3 ---> H2O+FeF3)

Which chemical equation is an example of a neutralization reaction? 2KClO3 → 2KCl + 3O2 CH4 + 2O2 → 2CO2 + 2H2O Zn + 2HCl → ZnCl2 + H2 2Na + Cl2 → 2NaCl HCl + NaOH → NaCl + H2O

HCl + NaOH → NaCl + H2O

Write the formula of the salt formed by the neutralization of magnesium hydroxide and phosphoric acid.

Mg3(PO4)2 Mg(OH)2+H3PO4 ---> Mg3(PO4)2+H2O

***WRONG When the net ionic equation is written for the chemical equation NaCl + AgNO3 → NaNO3 + AgCl which ion is a spectator ion? Na+ There are no spectator ions. AgCl Cl - Ag+

Na+

Write the formula of the salt formed by the neutralization of sodium hydroxide and sulfuric acid.

Na2SO4 H2SO4 + Sr(OH)2 = SrSO4 + H2O

****WRONG Write the chemical equation that represents the dissolving of solid NaCl in water. Include all phase labels.

NaCl(s)--->Na+(aq) + Cl-(aq)

Assuming that a double-replacement reaction occurs, what are the products that are formed? Do not include phase labels, but make sure your products are balanced. NaCl + AgNO3 →

NaNO3+AgCl

Assuming that a single-replacement reaction occurs, what are the products that are formed? Do not include phase labels. SrCl2 + Ca ----> ____

Sr+CaCl2 (sub 2)

Use the activity series to determine if each halogen, represented by X, will react with MgBr2 according to this chemical equation: MgBr2(s) + X2(s) → MgX2(s) + Br2(l) F2: yes or no? Cl2: Yes or no? l2: yes or no?

YES, YES, NO

Why must proper chemical equations be balanced? Select all that are correct. a. The number of different phases cannot change in a chemical reaction. b. Atoms are not created or destroyed in the course of a chemical reaction. c. A balanced chemical equation satisfies the law of conservation of matter. d. The mass of products is different from the mass of the reactants.

c. A balanced chemical equation satisfies the law of conservation of matter. b. Atoms are not created or destroyed in the course of a chemical reaction.

The chemical equation H2SO4 + PbO → PbSO4 + H2O is an example of what type of chemical reaction? single displacement combustion precipitation double displacement

double displacement

***HALF WRONG When the net ionic equation is written for the chemical equation Na2SO4 + Ba(NO3)2 → 2NaNO3 + BaSO4 which ion is a spectator ion? Ba2+ SO4^2- NO3- Na+

no Ba2+ no SO4^2- yes NO3- yes Na+

In chemistry, any ionic compound (soluble or insoluble) that is formed from a reaction between an acid and a base is called a(n) _________. salt substance neutralization product ionic compound

salt

The chemical equation H2SO4 + Mg → MgSO4 + H2 is an example of what type of chemical reaction? single displacement combustion precipitation double displacement

single displacement