Chapter 9-Test-Armstrong

Which are not chemical changes?

•Salt dissolving in water

•Coal burning

•Rust forms

•Frying an egg

•Mold on bread

•Ice melts

•Salt dissolving in water

•Ice melts

A molecule of two of the same type of atom

diatomic molecule

What type of reaction is this?

•General form:  A + BC  →  AC + B

• Element + Compound  →  Compound + Element

Single Displacement

____ AlBr3 + ____ K2SO4 → ____ KBr + ____ Al2(SO4)3

•Which coefficients correctly balance the above equation?

•A.  1,3,6,2

•B.   2,3,6,2

•C.   2,3,6,1

•D.   1,3,6,1

•C.   2,3,6,1

What are the products?

____I4O9*(s)*  →

I2 + O2

What are four signs of a chemical change?

Change in color, formation of a precipitate, evolution of a gas (bubbles), energy is released/absorbed

Which coefficients balance the equation?

____ Pb(OH)2 + ____ HCl → ____ H2O + ____ PbCl2

•A.  1,2,2,1

•B.   2,1,2,1

•C.   1,2,1,2

•D.   2,2,1,2

•A.  1,2,2,1

What coefficients balance the equation?

•____ C3H8 + ____ O2 → ____ CO2 + ____ H2O

•A.  1,2,3,4

•B.   1, 5,2,4

•C.   1, 5,3,4

D.   2, 9,6,16

D.   2, 9,6,16

What is the chemical equation?

•When solid mercury(II) sulfide is heated with oxygen, mercury metal and gaseous sulfur dioxide are formed.

HgS(s)+ O2(g)→ Hg(l)+ SO2(g)

What is the word equation?

FeCl3 + ____ NaOH → ____ Fe(OH)3 + ____NaCl

Iron 3 Chloride and Sodium Hydroxide forms Iron(III) oxide-hydroxide and sodium chloride

What are the products?

•____KI*(aq)* + ____Br2*(l)*  →

KBr + I2

•How much energy is added to produce the reaction?

•Is this and endothermic or exothermic reaction?

20Fe(s) + 3P4O10(s) + 3009 kJ  →   3P4(s) + 10Fe2O3(s)

3009 kJ is added, it is an endothermic reaction

In a ______ reaction the products are always carbon dioxide and water

combustion

Iron reacts with Oxygen to form

•A.  Iron Oxide

•B.   Iron (III) Oxide

•C.  Iron (II) Oxide

•D.  Iron Dioxide

•E.  None of these

•B.   Iron (III) Oxide

What type of reaction occurs when an element and an aqueous solution react

•A synthesis reaction

•A decomposition Reaction

•A displacement Reaction

•A combustion reaction

•A double displacement reaction

•A displacement Reaction

What is the skeleton equation for the production of carbon dioxide and water from methane and oxygen?

CH4 + O2 →CO2 + H2O

What is the product of Pb(OH)2 + ____ Au →

No Reaction

What coefficients balance this equation \n __Al*(s)* + ____F2*(g)*  →  _____AlF3 \n A. 1,2,3

B. 4,5,6

C. 7,8,9

D. 2,3,2

E. 2,2,3

F. 2, 1,2

D. 2,3,2

What is the word equation for \n Cu(s) + HNO3(aq) →Cu(NO3)2 (aq)+ NO(g) + H2O(l) \n (Hint Nitric Acid is HNO3)

Solid Copper and Aqueous Nitric Acid Form Copper 2 Nitrate and nitric oxide and water

What is the name of SnF4

•A.  Tin tetrafluoride

•B.   Tin pentafluoride

•C.   Tin (II) fluoride

•D.   Tin (IV) fluoride

•E.  None of these

•D.   Tin (IV) fluoride

What type of reaction and what is the product \n I4O9*(s)*  →

Decomposition, I2+O2

Which skeleton equation is correct?

A.  H +N2→ NH3

B.   H + N→ NH

C.   NH3 → N2 + H2

D.  H + N → NH3

C.   NH3 → N2 + H2

Which of the following are molecular compounds

•Iron (III) oxide

•Sodium chloride

•Nitrogen oxide

•Calcium chloride

•Aluminum oxide

Copper (II) Nitrate

•Nitrogen oxide

What does the symbol (aq) represent?

•A.  An acid

•B.  An alkaline solution

•C.  A polar substance

•D.  A substance is dissolved in water

•E.  A Non-Polar Substance

•F.  A reversible reaction

•D.  A substance is dissolved in water

What is not a clue of a chemical reaction?

The Substance bends

What must happen for a chemical reaction to occur?

Bonds must break and form

What does a Chemical Reaction to be balanced mean?

There is the same number of atoms on both sides of the equation

What does the Symbol Pt over an arrow in a reaction represent?

A Catalyst

2Na(s) + Cl2(g) →

2NaCl(s)

Ag(s) +NaCl(aq) →

No Reaction

C(s) + O2 (g) →

CO2(g)

Fe(s) +Cl2 (g) →

FeCl3(s)

SO2(g)→

S8(s) + O2(g)