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Spring TEKS review

Total questions: 61

Worksheet time: 2hrs 56mins

Name
Class
Date
1.
__Na + __Cl2 --> __NaCl
a)
1,1,2
b)
2,1,2
c)
2,1,1
d)
already balanced
2.
Balancing this reaction: ____ CH4 + ____ O2 ---> ____ CO2 + ____ H2O
a)
2,1,3,1
b)
1,2,1,2
c)
1,2,2,1
d)
2,1,1,2
3.
_Al + _HCl →_H2 + _AlCl3
a)
2 Al + 2 HCl → 2 H2 + 6 AlCl3
b)
3 Al + 3 HCl → 6 H2 + 2 AlCl3
c)
1 Al + 1 HCl → 3 H2 + 1 AlCl3
d)
2 Al + 6 HCl → 3 H2 + 2 AlCl3
4.
Evidence of a chemical reactions is anything that shows - 
a)
a new substance has formed
b)
a solid dissolved in a liquid
c)
interaction between 2 gases
d)
a change in the state of matter
5.
One of the signs of a chemical reaction taking place is:
a)
Bubbles are produced 
b)
Reactants are not combining
c)
Products are not forming
d)
Color is not changing
6.
Which of the following describes a precipitate?
a)
a liquid forms when a block of metal is heated
b)
a solid forms when one liquid is poured into another
c)
a gas forms when a solid is placed in a liquid
d)
bubbles form when an acid is poured on a rock
7.
Which is NOT an indication of a chemical change?
a)
temperature change
b)
formation of a precipitate
c)
shape change
d)
production of light
8.
You know you a chemical reaction has occurred if 
a)
there is a precipitate.
b)
there is a color change.
c)
there is a temperature change.
d)
All of these answers are evidence.
9.
Four students performed four different investigations by combining different substances. Which of the observations is most indicative of a chemical reaction?
a)
investigation 1
b)
investigation 2
c)
investigation 3
d)
investigation 4
10.
For the Balanced Reaction: 3 Mg + 1 Fe2O3 → 3 MgO + 2 Fe; What is the Ratio of moles of Mg to moles Fe?
a)
3mol Mg / 2 mol Fe
b)
2 mol Mg/ 3 mol Fe
c)
1 mol Fe/ 2 mol Fe
d)
3 mol MgO / 2 mol Fe
11.
2CO  +  O2  −-> 2CO2
How many liters of carbon dioxide are produced from 10L of carbon monoxide?
a)
10
b)
20
c)
1
d)
5
12.
N2 +  3H2 → 2NH3 
How many moles of hydrogen are needed to react with 2 moles of nitrogen?
a)
6
b)
2
c)
3
d)
1
13.
What is a limiting reactant?
a)
the reactant that determines how much product can be made
b)
the reactant that is in excess
c)
the product that you can make the most of
d)
the amount of reactants that react with each other
14.

1 Cheese + 2 Bread --> 1 grilled cheese

How many grilled cheeses can you make with 26 slices of bread and 14 pieces of cheese?

a)

14

b)

13

c)

26

15.

Identify the limiting and excess reactants in the reaction shown.

a)

N2 is limiting and H2 is excess. 

b)

H2 is limiting and N2 is excess. 

c)

NH3 is both limiting and excess.

d)

There is no limiting reactant. 

16.

What is an excess reactant?

a)

The reactant that inhibits a chemical reaction from occurring

b)

The reactant that is present in a greater quantity than necessary for a chemical reaction to occur.

c)

The reactant that is completely consumed in a chemical reaction

d)

The reactant that is not necessary for a chemical reaction to occur

17.

At constant pressure, when the temperature of a gas is decreased, what happens to its volume?

a)

it decreases

b)

it will vary

c)

it increases

d)

it remains constant

18.

At constant pressure, how are the temperature and volume of a gas related?

a)

The are directly proportional

b)

They are inversely proportional

c)

They are constant

d)

They are indirectly proportional

19.

If the TEMPERATURE of the gas in the piston increases, the PRESSURE on the piston will...

a)

increase

b)

decrease

c)

stay the same

20.

When temperature increases the pressure of the gas...

(a)  

21.

What relationship does this demonstrate?

a)

as volume decreases, pressure increases

b)

as volume increases, pressure decreases

c)

as volume increases, pressure increases

d)

as volume decreases, pressure decreases

22.
Dalton's law of...
a)
Partial Pressure
b)
Thermodynamics
c)
Ideal Gas
d)
Physics
23.
A mixture of hydrogen, nitrogen, and water vapor has a total pressure of 864 mmHg. The partial pressure of hydrogen is 220 mmHg and that of nitrogen is 410 mmHg. What is the partial pressure of water vapor?
a)
234 mmHg
b)
1.37 mmHg
c)
2.64 mmHg
d)
1, 494 mmHg
24.

A tank of gas contains 50 kPa of helium, 50 kPa of argon, and 100 kPa of neon. What is the total pressure of the gas mixture?

a)

100 kPa

b)

50 kPa

c)

200 L

d)

200 kPa

25.

If 20 g of water undergoes a temperature change from 25° C to 30° C, how much heat energy (Q) moves from the water to the surroundings (the c for water is 4.18 j/g C)? Q=mcT

a)

418 J

b)

209 J

c)

83 J

d)

4.18 J

26.

An exothermic reaction will make its environment feel

a)

warmer.

b)

cooler.

27.

An endothermic reaction will make its environment feel

a)

warmer.

b)

cooler.

28.

How many Joules of heat energy are required to change the temperature of 250 g of H2O from 13°C to 49°C?

a)

37,620 J

b)

51,205 J

c)

13,585 J

d)

121,120 J

29.

What letter represents the energy of the products?

a)

A

b)

B

c)

C

d)

D

30.

What letter represents the activation energy for the forward reaction?

a)

A

b)

B

c)

C

d)

D

e)

E

31.

Is the forward reaction endothermic or exothermic?

a)

endothermic

b)

exothermic

32.

What is the ΔH of the forward reaction?

a)

40 kJ

b)

20 kJ

c)

80 kJ

d)

-60 kJ

e)

-20 kJ

33.
What is the sign of ΔH for all endothermic reactions?
a)
Positive
b)
Negative
34.

6 CO2+ 6 H2O + Energy → C6H12O6 + 6 O26\ CO_2+\ 6\ H_2O\ +\ Energy\ \rightarrow\ C_6H_{12}O_6\ +\ 6\ O_2

a)

endothermic reaction

b)

exothermic reaction

35.

O2(g) + 2 H2 (g) → 2 H2O (g) + EnergyO_2\left(g\right)\ +\ 2\ H_2\ \left(g\right)\ \rightarrow\ 2\ H_2O\ \left(g\right)\ +\ Energy  

a)

endothermic

b)

exothermic

36.
State whether the following compound is soluble or insoluble.Silver acetate AgC2H3O2
a)
Soluble 
b)
Insoluble
37.
State whether the following compound is soluble or insoluble.nickel chloride NiCl2
a)
Soluble 
b)
Insoluble
38.
State whether the following compound is soluble or insoluble. iron(ii) sulfide FeS
a)
soluble
b)
insoluble
39.

Which of the following describes a double replacement reaction?

a)

two or more reactants form one product

b)

one reactant forms two or more products

c)

one element and one compound form a different element and a different compound

d)

two compounds form two different compounds

40.

A person can determine if a substance will be a precipitate by using...

a)

the activity series

b)

the Periodic Table

c)

the solubility rules

d)

all of these

41.

Which symbol would indicate the precipitate in a chemical equation?

a)

(l)

b)

(s)

c)

(g)

d)

(aq)

42.

The products for FeCl3 + AgNO3 ----> are...

a)

Fe(NO3)3 (aq) + AgCl (s)

b)

FeNO3 (aq) + AgCl3 (s)

c)

Fe(NO3)3 (s) + AgCl (aq)

43.

A neutralization reaction yeilds what two products?

a)

Acid + Base

b)

Water + Salt

c)

Water + Neutral

d)

Soap + Lemon

44.

A type of chemical that forms solutions that taste sour, due to high concentrations of positive hydrogen ions

a)

acid

b)

base

c)

salt

d)

pH

45.

What is considered to be in the middle of the pH scale

a)

acidic

b)

neutral

c)

basic

d)

indicator

46.

If there is excess hydroxide ions, the solution will be...

a)

acidic

b)

basic

c)

neutral

47.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
48.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
49.

What is the pH of a solution that has a [H+] of 2.5 x 10-5?

a)

4.60

b)

2.5

c)

5.0

d)

7

50.

What would be the pH of a solution with an [H+] of 0.001?

a)

3

b)

1

c)

-3

d)

-1

51.

What is the formula for phosphorous acid?

a)

H3PO4

b)

H2PO4

c)

H3P

d)

H3PO3

52.

Name this acid with the formula HF

a)

hydrofluoric acid

b)

hypofluoric acid

c)

hydrogen fluorine acid

d)

fluoric acid

53.

What is the formula for hydrochloric acid?

a)

HCl

b)

HClO

c)

H3ClO3

d)

HClO3

54.
Mg(OH)2
a)
magnesium hydroxide acid
b)
hydromagnesium acid
c)
magnesium oxygen hydride
d)
magnesium hydroxide
55.
Barium hydroxide
a)
BaOH
b)
Ba2OH
c)
Ba(OH)2
56.

What are the products of this reaction: Fe + Na2CO3 ?

a)

Na2 + Fe(CO3)2

b)

Na + CO3Fe

c)

Na + Fe2CO3

d)

No Reaction

57.

Which compound is higher in reactivity, Ag or Ca?

a)

Ag

b)

Ca

c)

Neither

d)

They're equal

58.

Defined as the gain of electrons.

a)

oxidation

b)

redox

c)

reduction

d)

LEO GER

59.
Is calcium oxidized or reduced in the following reaction? 
2 CaO--> 2 Ca + O2
a)
Oxidized
b)
Reduced
60.

a)

Synthesis

b)

Single replacement

c)

Double Replacement

d)

Decomposition

e)

Combustion

61.

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

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