Free Printable Assessment of high grade student difficulties in learning about

1.

Acids make litmus paper turn

a)

Red

b)

Blue

c)

Black

d)

Yellow

2.

Bases feel

a)

rough

b)

slippery

c)

moist

d)

dry

3.

Bases react with

a)

acids to produce salts and water

b)

water to produce acids and salts

c)

salts to produce acids and water

d)

neither acids, salts, nor water

4.

Which type of solution is one with a pH of 7

a)

acidic

b)

basic

c)

neutral

d)

non

5.

Which are the correct products for these reactants HCl + NaOH

a)

HOH + ClNa

b)

NaCl + H2O

c)

H3O + NaCl2

d)

NaOH + Cl

6.

Which of the following chemical reactions represents an acid-base reaction?

a)

HBr + KOH àKBr + H2O

b)

ZnCl2 + MgSO4 àZnSO4 + MgCl2

c)

H2SO4 + CaCl2 à CaSO4 + HCl

d)

NH4OH + KCl àKOH + NH4Cl

7.

Strong acids are

a)

strong electrolytes.

b)

nonelectrolytes.

c)

weak electrolytes.

d)

also strong acids.

8.

Which statement about Arrhenius acids is FALSE?

a)

Their water solutions are called aqueous acids.

b)

They are molecular compounds with ionizable hydrogen atoms.

c)

Their pure aqueous solutions are electrolytes.

d)

They increase the concentration of hydroxide ions in aqueous solution.

9.

Whose definition of acids and bases emphasizes the role of protons?

a)

Brønsted and Lowry

b)

Lewis

c)

Arrhenius

d)

Faraday

10.

What is the pH of a 1 x 10–5 M KOH solution?

a)

3

b)

5

c)

9

d)

11

11.

What is the molarity of an HCl solution if 50.0 mL is neutralized in a titration by 40.0 mL of 0.400 M NaOH?

a)

0.200 M

b)

0.280 M

c)

0.320 M

d)

0.500

12.

What is the conjugate base of the hydronium ion, H₃O⁺?

a)

OH–

b)

H+

c)

H₂O

d)

H₃O²⁺

13.

A conjugate acid is an acid that forms when

a)

the acid gains a proton

b)

a base loses a proton

c)

a base gains a proton

d)

an atom accepts an electron pair

14.

An amphoteric species is one that reacts at 25°C as a

a)

acid or base

b)

base only

c)

acid only

d)

acid only

15.

Acid’s taste

a)

Salty

b)

Bitter

c)

Sweet

d)

Sour

Assessment of high grade student difficulties in learning about

Total questions: 15

Worksheet time: 19mins

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