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acid & bases

Total questions: 41

Worksheet time: 30mins

Name
Class
Date
1.
If a substance has a pH of 10 it is considered
a)
Acidic
b)
Basic
c)
Neutral
2.
Acids produce _________ ions when they break down or dissocciate. 
a)
Hydroxide (OH-)
b)
Water
c)
Chlorine (Cl-)
d)
Hydrogen (H+)
3.
Bases release ____________ ions when they break down or dissociate. 
a)
Hydrogen (H+)
b)
Hydroxide (OH-)
c)
Chlorine (Cl-)
d)
no
4.
Water is neutral because the number of hydrogen and hydroxide ions is _________.
a)
the same
b)
different
5.
The pH scale ranges from ____________.
a)
0-7
b)
1-100
c)
1-20
d)
0-14
6.
A(n) ______ is a substance with a pH less than 7
a)
Acid
b)
Alkaline
c)
Base
d)
Buffer
7.
A(n) _______ is a substance with a pH greater than 7.
a)
Base
b)
Acid
c)
Buffer
d)
Water
8.
hydrochloric acid
a)
HClO3
b)
HClO2
c)
HClO
d)
HCl
9.
Which of the following is a base?
a)
orange juice
b)
water
c)
vinegar
d)
dishwashing detergent
10.
Which of the following statements is correct?
a)
Blue litmus paper turns red when placed in a base.
b)
Red litmus paper turns blue when placed in a base.
c)
Blue litmus paper stays blue when placed in an acid.
d)
Red litmus paper stays red when placed in a base.
11.
 Which of the following is an acid?
a)
shampoo
b)
baking soda
c)
orange juice
d)
water
12.
Which is the stronger acid?
a)
pH 1
b)
pH 4
c)
pH 8
d)
pH 13
13.
What do acids do to red litmus paper?
a)
Turn it Red 
b)
Turn it Blue
c)
Turn it Yellow
d)
Turn it Green
14.

4. Which of the following is/are natural Indicators?

a)

A) Litmus papers

b)

B) Japanese roses

c)

C) Green eggplant

d)

D) Purple cabbage

15.

pH is the measure of the concentration of ______.

a)

Acids

b)

H+ ion

c)

OH- ion

d)

Bases

16.

According to Arrhenius, what is the definition of an ACID?

a)

a substance that contains hydroxide and ionizes to produce OH-

b)

a substance that contains hydrogen and ionizes to produce H+

c)

a substance that contains hydrogen and ionizes to produce OH-

d)

a substance that contains hydroxide and ionizes to produce H+

17.

According to Bronsted-Lowry, what is the definition of an BASE?

a)

a substance that donates a hydrogen (H+) ion

b)

a substance that donates a hydroxide (OH-) ion

c)

a substance that accepts a hydrogen (H+) ion

d)

a substance that accepts a hydroxide (OH-) ion

18.

What is being donated/accepted between conjugate acid-base pairs?

a)

a hydrogen (H+) ion

b)

a hydroxide (OH-) ion

c)

water

d)

a neutron

19.

What is the conjugate base in the following reaction?

a)

HCO3-

b)

HCl

c)

H2CO3

d)

Cl-

20.
What is the conjugate acid in the following equation?
a)
PO43- 
b)
HNO3 
c)
NO3- 
d)
HPO42-
21.
Which of the following shows the correct conjugate acid base pair?
a)
HCI (acid) / H3O+ (conjugate base)
b)
HCI (acid) / CI- (conjugate base)
c)
HCI (base) / CI- (conjugate acid)
d)
HCI (base) / H3O+ (conjugate acid)
22.

Calcium hydroxide is a well known ​ (a)   with low ​ (b)   in water unlike other ​ (c)  

Choose from the below words
base
solubility
alkalis
23.

Which of the following correctly identifies an Acid-Base Pair?

a)

HH4+ , OH-

b)

H2O , OH-

c)

CaCO3 ,CaCl2

d)

HNO3 , H2SO4

24.

Which of the following show an acid and its conjugate base pair (in that order)

a)

H2SO4, SO42-

b)

OH-, H2O

c)

NH4+, H2O

d)

H2CO3, HCO3-

25.

The conjugate acid of HCO3- is ___ and the conjugate base of HCO3- is ___.

a)
H2CO3; CO3-2
b)
CO3-2; CO3-2
c)
H2CO3; H2O
d)
H2O; H2CO3
26.
What property do all three of these common household substances have in common?
a)
they are all basic
b)
they taste sour
c)
they have a pH below 7
d)
they all turn litmus paper red
27.
If you have a solution that is very acidic with a pH of 3.5, what can you do to raise the pH? 
a)
add more acid
b)
add more water
c)
increase the temperature
d)
add a base
28.
Which of the following word pairs correctly completes the sentence below?
_______ are corrosive substances characterized as having a strong smell, a sour taste, and a _______.
a)
Acids; pH less than 7
b)
Acids; pH greater than 7
c)
Bases; pH greater than 7
d)
Bases; pH less than 7
29.
If an acid is combined with a base of equal strength, the result will most likely be
a)
a neutral solution.
b)
a stronger acid.
c)
impossible to tell without testing the pH.
d)
a stronger base
30.
Which of the following is true about acids and bases?
a)
The lower the pH, the stronger the acid
b)
the higher the pH, the stronger the acid
c)
The lower the pH, the more neutral the acid
d)
The higher the pH, the weaker the base
31.
On the pH scale what numbers are bases?
a)
8-14
b)
0-7
c)
7
d)
1
32.

What is the pH of a solution that results from the complete neutralization of an HCl solution with a KOH solution?

a)

1

b)

7

c)

10

d)

4

33.

What type of reaction is shown?


Acid + Base → Salt + Water

a)

Combustion

b)

Neutralization

c)

Physical

d)

Nuclear

34.

Which of the following is a base?

a)

orange juice

b)

water

c)

vinegar

d)

dishwashing detergent

35.

Which of the following is an acid?

a)

shampoo

b)

baking soda

c)

orange juice

d)

water

36.

Which of these turn red litmus paper blue?

a)

acids

b)

bases

c)

water

37.

Acids react with

a)

water to produce bases and salts

b)

neither bases, salts nor water

c)

bases to produce salts and water

d)

salts to produce bases and water

38.

Phenolophalein turns from clear to pink when the pH turns

a)

acidic

b)

basic

39.

Which of the following are the characteristics of a BASE?

a)

Very bitter in taste

b)

Have pH of less than 7

c)

Turns blue litmus red

40.

vinegar is an example of

a)

acid

b)

base

c)

neither acid or base

41.

pure water is_________

a)

Acidic

b)

Basic

c)

neutal

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