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WorksheetsUnit 10 Exam
Total questions: 40
Worksheet time: 3hrs 20mins
What is a titration?
when the moles of hydrogen ions is equal to the moles of hydroxide ions
adding a known amount of solution of known concentration to determine the concentration of an unknown
reaction in which an acid and a base react in an aqueous solution to produce a salt and water
the extent of ionization of an acid or base
Phenolophalein turns from clear to pink when the pH turns...Table M
acidic
basic
saline
ionic
Which type of ion does an Arhennius Base produce when it is dissolved in water?
oxide
oxygen
hydronium
hydroxide
LiOH + H2SO4 -->
If a 25 mL sample of HCl is neutralized by 21.3 mL of 0.78 M KOH, what is the molarity of HCl? The balanced equation is:
HCl + KOH --> KCl + HOH Remember table T
0.00033 M HCl
0.0013 M HCl
0.35 M HCl
0.66 M HCl
What is the color of methyl orange in a solution with a pH of 2.5? Table M
Yellow
Red
Orange
Colorless
What is the color of litmus in a solution with a pH of 8.8? Table M
Pink
Blue
Red
Colorless
The following neutralization reaction occurs in the classroom.
HCl + KOH --> H2O + KCl
If a student uses 25.0 mL of a 0.5M solution of KOH, what is the molarity of the acid if 15.0mL of acid neutralized?
0.8M
1.2M
12.5M
8.0M
acid + base will produce a
salt + hydrogen
salt + water
salt + carbon dioxide + water
salt
Based on Reference Table F, which of these salts is the best electrolyte?
sodium nitrate
magnesium carbonate
silver chloride
barium sulfate
A substance that conducts an electrical current when dissolved in water is called
catalyst
metalloid
electrolyte
nonelectrolyte
Which of the following solutes will result in a solution with the strongest conductivity? Remember the more particles and greater concentration the greater the conductivity.
1.0 M C6H12O6
1.0 M MgBr2
2.0 M NaCl
2.0 M CaF2
Which of the following is not an electrolyte?
KBr
LiOH
RbNO3
CH4
Which solute is the most soluble at 10 o C? Use your reference tables if it is better than the given chart.
KI
KClO3
NH4Cl
NH3
Which solute is the least soluble at 90 ⁰C? Use your reference tables if the chart given is to small.
SO2
KClO3
KI
HCl
When 20 grams of potassium chlorate, KClO3, is dissolved in 100 grams of water at 80 ºC, the solution can be correctly described as: Use your reference tables if the chart given is to small.
supersaturated
saturated
unsaturated
When 50 grams of KCl is dissolved in 100 grams of water at 50 ºC, the solution can be correctly described as: Use your reference tables if the chart given is to small.
supersaturated
unsaturated
saturated
How many more grams of KNO3 dissolve at 50 ⁰C compared to 0 ⁰C? Use your reference tables if the chart given is to small.
85 g
15 g
70 g
100 g
How many grams of SO2 can dissolve at 50 ⁰C? Use your reference tables if the chart given is too small.
5 g
10 g
20 g
39 g
Determine the molarity of 2.25 mole of sulfuric acid, H2SO4, dissolved in 725 mL of solution. Table T
322.2 M
3.1 M
0.32 M
2.25 M
How many moles of NaCl are present in a solution with a molarity of 8.59M and 125 mL of solution? Table T
1.07 gram
62.7 mol
1.07 mol
62.7 grams
What is the concentration, in percent by mass, of 0.62 g of solute in 45.0 g of solution? Table T
0.014 %
1.4 %
0.13%
6.2%
What is the concentration of a solution in parts per million if 0.02 grams of NaCl is dissolved in 1000 grams of water?
2 ppm
20 ppm
200 pm
0.2 ppm
Adding a nonvolatile solute to a liquid will ___.
depress both the freezing point and the boiling point
elevate both the freezing point and the boiling point
depress the freezing point and elevate the boiling point
elevate the freezing point and depress the boiling point
Use table F - Zinc Hydroxide Zn(OH)2 is
Soluble
Insoluble
Identify the molecule below that is a polar molecule
CF4
H2S
CO2
N2
HSO4-(aq)+H2O(l) → H3O+(aq)+SO42-(aq)
According to one Acid-Base Theory, the H2O (l) molecules act
as a base because they accept H+ ions
as a base because they donate H+ ions
as an acid because they accept H+ ions
as an acid because they donate H+ ions
What is the color of bromcresol green indicator in a solution with a pH value of 2.0?
Blue
Green
Red
Yellow
What is the percent composition by mass of nitrogen in the compound N2H4 (gram-formula mass 32 g/mol)?
13%
44 %
88 %
93 %
Which statement describes an electrolyte?
An electrolyte conducts an electric current as a solid and dissolves in water.
An electrolyte conducts an electric current as a solid and does not dissolve in water
When an electrolyte dissolves in water, the resulting solution conducts an electric current because of mobile ions.
When an electrolyte dissolves in water, the resulting solution does not conduct an electric current.
Compared to a 1.0-liter aqueous solution with a pH of 7.0, a 1.0-liter aqueous solution with a pH of 5.0 contains
10 times more hydrogen ions
100 times more hydrogen ions
10 times more hydroxide ions
100 times more hydroxide ions
Which phrase describes the molecular polarity and distribution of charge in a molecule of carbon dioxide, CO2?
Polar and symmetrical
Polar and asymmetrical
Nonpolar and symmetrical
Nonpolar and asymmetrical
Based on Table H, what is the vapor pressure of ethanol at 90.°C?
40 kPa
48 kPa
114 kPa
150 kPa
At standard pressure, the boiling point of an unsaturated NaNO3(aq) solution increases when
the solution is diluted with water
some of the NaNO3(aq) solution is removed
the solution is stirred
more NaNO3(s) is dissolved in the solution
According to Table G, which substance forms an unsaturated solution when 85. grams of the substance are stirred into 100. grams of H2O at 10.°C?
KNO3
KI
NH3
NaCl
