Titrations - Assessment

1.

Multiple Choice

30 sec

1 pt

What allows us to know when the end point has been reached?

Bubbles

Feels warm

indicator changing color

Turns to a solid

2.

Multiple Choice

30 sec

1 pt

acid + base ₋>

salt + hydrogen

salt + water

salt + carbon dioxide + water

salt

3.

Multiple Choice

30 sec

1 pt

What does pH measure?

Amount of Oxygen Ions

Amount of Hydrogen Ions

The amount of salt in a solution

The density

4.

Multiple Choice

1 min

1 pt

What is this piece of apparatus called

Pipette

Burette

Janette

Cuvette

5.

Multiple Choice

30 sec

1 pt

A solution with a pH of 8.6 would be...

Acid

Base

Neutral

Acid and Base

6.

Multiple Choice

30 sec

1 pt

Why do we perform a titration?

To determine the concentration of an unknown solution

To see if a reaction will occur between an acid and base

To find the mass of an unknown acid

To find the molar mass of an unknown solution

To calculate the viscosity of the solution

7.

Multiple Select

30 sec

1 pt

What are some things we will need for a titration?

A solution of known concnetration

A burette

indicator

mass balance

a bunsen burner

8.

Multiple Choice

30 sec

1 pt

If it takes 54 mL of 0.1 M NaOH to neutralize 125 mL of an HCl solution, what is the concentration of the HCl? (record you answer with the correct unit)

0.043 M

0.034 M

0.065 M

0.77 M

9.

Multiple Choice

30 sec

1 pt

A 25.0 mL sample of HCl was titrated to the endpoint with 15.0 mL of 2.0 M NaOH. What is the molarity of HCl?

1.6 M HCl

0.03 M HCl

0.6 M HCl

1.2 M HCl

10.

Multiple Choice

15 mins

1 pt

Which point on the titration curve corresponds to the point at which the moles of the added strong base are equal to the moles of the weak acid initially present?

Q

R

S

T

11.

Multiple Choice

30 sec

1 pt

If it takes 25 mL of 0.05 M HCl to neutralize 345 mL of NaOH solution, what is the concentration of the NaOH solution?

0.0036 M NaOH

0.00125 M NaOH

3.62 M NaOH

1.25 M NaOH

12.

Multiple Choice

30 sec

1 pt

I am titrating 1M HCl with 1M NaOH. I have 25mL of HCl. How much NaOH will I need?

2.5mL

5mL

25mL

50mL

13.

Multiple Choice

2 mins

1 pt

I have 25mLof 1M HCl which neutralises 20mL of NaOH. What is the concentration of the NaOH?

0.8 M

1 M

1.25 M

14.

Multiple Choice

30 sec

1 pt

What is the endpoint of a titration

Where the amount of acid and base are balanced according to the equation

Where there is no base

At the end

15.

Multiple Choice

5 mins

1 pt

A 50.0 mL sample of Ca(OH)₂ is neutralized by 300.0 mL of HCl solution with a pH of 1.3. Calculate the molarity of the Ca(OH)₂ solution.

1.0 M

0.50 M

0.15 M

0.30 M

16.

Multiple Choice

3 mins

1 pt

Identify the products of the chemical equation
3 LiOH + H₃PO₄ →

Li₃PO₄ + 3 H₂O

LiPO₄ + 3 H₂O

Li(PO₄)₃ + 3 H₂O

BOY + La + N₂

17.

Multiple Choice

3 mins

1 pt

What acid and what base would you choose to prepare the salt potassium chlorate?

KOH and HClO₃

KOH and HClO₂

HK and OHClO₃

HK and OHClO₂

18.

Multiple Choice

15 mins

1 pt

At point P in the titration, which of the following species has the highest concentration?

HA

A^–

H₃O⁺

OH^–

19.

Multiple Choice

15 mins

1 pt

Which of the following best represents a 0.100-molar solution of H₂SO₄ in water?

20.

Multiple Choice

15 mins

1 pt

Equal moles of the indicated acids are dissolved in the amounts of water shown in the beakers below. In which solution will the percent ionization of the acid be the lowest?

Beaker 1

Beaker 2

Beaker 3

Beaker 4

21.

Multiple Choice

15 mins

1 pt

Equal volumes of 0.10-molar H₃PO₄ and 0.20-molar KOH are mixed. After equilibrium is established, the type of ion in solution in largest concentration, other than the K⁺ ion, is

H₂PO₄ ^–

HPO₄ ^2–

PO₄ ^3–

OH^-

22.

Multiple Choice

15 mins

1 pt

What part of the curve corresponds to the optimum buffer action for the acetic acid/acetate ion pair?

Point V

Point Z

Along all of section WY

Along all of section YZ

23.

Multiple Choice

15 mins

1 pt

Which of the following indicators is the best choice for this titration?

Methyl orange (pH range of color change is 3.2 - 4.4)

Methyl red (pH range of color change is 4.8 - 6.0)

Bromothymol blue (pH range of color change is 6.1 - 7.6)

Phenolphthalein (pH range of color change is 8.2 - 10.0)

24.

Multiple Choice

30 sec

1 pt

What is the pH at the equivalence point.

The pH is approximately 5

The pH is approximately 6

The pH is approximately 8

The pH is approximately 9

25.

Multiple Choice

30 sec

1 pt

What is the endpoint of a titration

Where the amount of acid and base are equal as shown by a colour change

Where there is no base

When the volume of base in the burette is used up

When there is no acid

26.

Multiple Choice

30 sec

1 pt

Which type of titration is shown by this titration curve?

Titration of a strong acid by a strong base

Titration of a weak acid by a strong base

Titration of a strong base by a strong acid

Titration of a weak base by a strong acid

27.

Multiple Choice

3 mins

1 pt

Which curve is produced by the addition of a 0.1 molL^-1 strong acid to a 0.1 molL^-1 weak base?

A

B

C

D

28.

Multiple Choice

45 sec

1 pt

CH₃COOH is titrated with NaOH. Name the salt produced and its pH at the equivalence point.

CH₃COONa, pH at 5

CH₃COONa, pH at 7

CH₃COONa, pH at 9

NaCH₃COO, pH at 9

29.

Multiple Choice

30 sec

1 pt

What is the volume in this burette?

24.1mL

24.3mL

24.2L

24.2mL

30.

Multiple Choice

2 mins

1 pt

Calculate the average volume of acid needed for this neutralisation

15.2cm³

15.0cm³

35.5cm³

30.1cm³

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