Chemistry: Water and Solution Chemistry 2, assignment help

QUESTION 1

Bases are able to cancel an acid’s properties.

TRUE

FALSE

2 points

QUESTION 2

A substance is added to pure water and the concentration of aqueous H⁺ ions increases. What kind of substance has been added to the water?

an acid

a base

water

either an acid or a base

3 points

QUESTION 3

Which of the following definitions of acids and bases focuses on the transfer of the H⁺ particle?
I. Arrhenius
II. Brønsted -Lowry
III. Lewis

I and II

I and III

II and III

I, II and III

3 points

QUESTION 4

Which formula is a Brønsted-Lowry base and a Lewis base, but not an Arrhenius base?

Br⁻

OH⁻

Na⁺

H₃PO₄

3 points

QUESTION 5

Which observable evidence indicates that a base completely dissociates in water?

		The pH of the newly created solution is near 7.00.
		The chemical formula for the base includes nitrogen.
		The freezing point of the newly created solution is lower than that of pure water.
		The solution created by dissolving the base in water conducts electricity.

3 points

QUESTION 6

The most likely pH for hydrochloric acid secreted from the stomach lining to help break down food is:

1

5

9

14

3 points

QUESTION 7

What is the pH of a solution containing a 1.0 x 10⁻⁴ M solution of HCl?

1

4

1 x 10⁴

1 x 10⁻⁴

3 points

QUESTION 8

The [OH⁻] of a given solution = 1.0 x 10⁻⁹ M. What is this solution’s pOH?

1

5

9

14

3 points

QUESTION 9

Match each common acid or base with its correct formula.

	NaOHRead Answer Items for Question 9
	HNO₃Read Answer Items for Question 9
	NH₃Read Answer Items for Question 9
	HC₂H₃O₂Read Answer Items for Question 9
	H₂SO₄Read Answer Items for Question 9
	H₂SO₃Read Answer Items for Question 9
	Ca(OH)₂Read Answer Items for Question 9

Answer

A.	Sulfurous Acid
B.	Ammonia
C.	Sulfuric Acid
D.	Calcium Hydroxide
E.	Nitric Acid
F.	Acetic Acid
G.	Sodium Hydroxide

A neutralization reaction is the reaction between an acid and its conjugate base.

TRUE

FALSE

2 points Save Answer

QUESTION 2

A neutral salt is formed by which type of reaction?

strong acid-weak base

strong acid-strong base

weak acid-strong base

weak acid-weak base

3 points Save Answer

QUESTION 3

Which is always true of a salt?

shows both acidic and basic properties

creates a neutral pH in solution

is an ionic compound formed from an acid-base reaction

can react with an acid but not with a base

3 points Save Answer

QUESTION 4

A net ionic equation does not show ions that are common to both reactants and products.

TRUE

FALSE

2 points Save Answer

QUESTION 5

The net ionic equation, H3PO4 (aq) + 3 OH− (aq) Imported Asset PO4−3 (aq) + 3 H2O (l), best represents which type of acid-base reaction?

strong acid-strong base

weak acid-strong base

strong acid-weak base

weak acid-weak base

3 points Save Answer

QUESTION 6

Which is the correct net ionic equation for the following reaction: 2HI (aq) + Ca (OH)2 (aq) Imported Asset CaI2 (aq) + H2O (l)?

H+ (aq) + Ca+2 (aq) + 2 I− (aq) Imported Asset CaI2 (aq)

Ca+2 (aq) + 2 OH− (aq) Imported Asset Ca(OH)2 (aq)

H+ (aq) + OH− (aq) Imported Asset H2O (l)

2HI (aq) + Ca (OH)2 (aq) Imported Asset CaI2 (aq) + H2O (l)

3 points Save Answer

QUESTION 7

When choosing which indicator to use in a titration reaction, you should consider:

what color you would like to see at the end point of the titration

the relative strengths of the acid and base you are using in the titration

how long the titration will take to complete

adjusting the end point of the titration to better match your indicator

3 points Save Answer

QUESTION 8

When added to a solution, a buffer can:

indicate when the equivalence point has been reached in a titration

lower the pH of the solution below 1

neutralize either a small amount of acid or base added to the solution

prevent the pH of the solution from changing

3 points Save Answer

QUESTION 9

Buffers can resist pH change by providing a weak base to neutralize added acid.

TRUE

FALSE

2 points Save Answer

QUESTION 10

Match the acid base pairs by arranging the acid name with the conjugate base formula.

Hydrogen carbonate