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WorksheetsAcid and Alkali
Total questions: 36
Worksheet time: 14mins
If indicator paper is red, the pH of the substance being tested is acidic.
sometimes
true
false
not at all
An acid-alkali __________________ tells us whether we have an acid or a base.
reaction
mixture
indicator
molecule
What can we use to show us that a chemical reaction is taking place?
a speedometer
an indicator
a bowl of water
a telescope
You can determine the concentration of acids or alkali in a solution by using
the pH scale
a salt
the periodic table of elements
a particle accelerator
Soap turns green in red cabbage indicator, so it is considered a(n)
an acid
an alkali
neutral
strong alkali
If something contains a hydroxide ion, it most likely is considered to be......
an acid
an alkali
neutral
all of the above
a liquid with a pH 10 is .............
an acid
an alkali
neutral
all of the above
A substance that changes color when exposed to acid or alkali solutions is called a(n) _____________.
salt
indicator
molecule
ion
Which item is not an acid?
mustard
lemon juice
sugar
tomato juice
Why is water considered to be neutral?
Because the concentration of hydrogen ions is more than the concentration of hydroxide ions
Because the concentration of hydrogen ions is exactly equal to the concentration of hydroxide ions
Because the concentration of hydrogen ions is less than the concentration of hydroxide ions
Because water does not have any hydroxide ions
What makes hydrangea flowers turn bluish-purple or pink?
It there are a lot of worms in the soil.
If the plant gets enough water.
If the soil is acidic or basic.
If the gardener added way too much fertilizer.
In a Science Lab, this symbol represent _______
corrosive
explosion
highly flammable
toxic
Alkali can often feel __________________
fuzzy
rough
moldy
slippery
On the pH scale, where can you find strong acids and strong alkali?
In the middle of the pH scale
On the right side of the pH scale
On the left side of the pH scale
On either end of the pH scale
What is a alkali?
Any compound that increases the number of hydronium ions when dissolved in water
Something that has a pH value greater than 7
Something that has a pH value less than 7
Any compound that increases the number of hydrogen ions when dissolved in water
What does litmus paper do?
creates a synthesis reaction
determines the amount of hydroxide in a solution
determines if a compound is metal or nonmetal
determines if a solution is basic or acidic
What does pH stand for?
properties of hydrogen
power of hydrogen
properties of hydroxide
power of hydroxide
Which set of substances listed is correctly sequenced from most to least acidic?
pH = 3, pH = 2, pH = 9
pH = 7, pH = 8, pH = 9
pH = 1, pH = 3, pH = 6
pH = 8, pH = 10, pH = 14
What is the other term of alkali?
properties of hydrogen
base
basis
bise
What acid we can get from eating grapes?
tartaric acid
Vitamic C
malic acid
hydrochloric acid
What is the main difference between acids and alkali?
The way they react to chemical changes
The taste
the pH
The way they react to physical changes
Which best describes milk?
slightly alkali
strongly alkali
slightly acidic
strongly acidic
When a certain number of hydrogen ions are mixed with the same number of hydroxide ions, _________________occurs.
less acid
more acid
neutralisation
blows up
____________ acid in muscles during vigorous exercise.
tartaric
lactic
malic
hydrochloric
Which chemical is a strong acid?
Sodium hydroxide
Sulfuric acid
Calcium hydroxide
Potassium hydroxide
Which of these chemicals can be found in indigestion tablets?
Hydrochloric acid
Sodium hydroxide
Sulfuric acid
Calcium carbonate
In Science Lab, this symbol represents ____________
harmful
corrosive
highly flammable
oxidising
What is an ionic compound that forms when a metal atom or a positive radical replaces the hydrogen of an acid called?
soap
disinfectant
salt
all of the above
In Science Lab, this symbol represents __________
thermal safety
don't touch
open flame
electrical risk
Which has the most acidic pH?
2.5
3.5
4.5
5.5
What acid we can get from eating apple?
tartaric acid
ascorbic acid
malic acid
citric acid
In Science Lab, this symbol represents __________
thermal safety
electrical risks
open flame
explosive material
These substances provide more oxygen which allows other material to burn more fiercely.
harmful
corrosive
highly flammable
oxidising
These substances are similar to toxic substance, but less dangerous.
harmful
corrosive
highly flammable
oxidising
In the Science Lab, this symbol represents ___________
animal safety
radioactive
biohazard
explosive material
In Science Lab, this symbol represents __________
keep eyes open
use eye protection
be aware of the hazardous substance and chemicals
make observations
