WorksheetsMixture, Compound, Acids, Bases, Physical and Chemical Changes
Total questions: 57
Worksheet time: 50mins
The table shows the pH of several solutions. Which solution is the most acidic?
vinegar
milk
water
bleach
Four substances were tested for pH, lemon juice (pH 2), baking soda (pH 9), bleach (pH 12), and milk (pH 6). Which of the following correctly lists the substances from most basic to acidic?
lemon juice, milk, baking soda, bleach
bleach, baking soda, milk, lemon juice
milk, lemon juice, baking soda, bleach
baking soda, bleach, lemon juice, milk
At what pH would all three indicators appear as yellow?
1.7
2.7
4.7
8.7
If a solution has a pH of 1.5, then litmus would turn
red
purple
blue
yellow
Which of the following substances are considered ACIDIC? (Select all that apply)
orange juice
soap
sulfuric acid
gastric acid
Which of the following substances are considered BASIC? (Select all that apply)
bleach
sea water
baking soda
lemon juice
During an experiment about the rate of dissolving you test temperature. In one beaker you use room temperature water, one beaker you use hot water and the last beaker you use ice water. In what order would the beakers dissolve the solute from slowest to fastest?
hot, cold, room temperature.
cold, hot, room temperature.
cold, room temperature, hot.
hot, room temperature, cold.
In this model how can you tell what is the solute?
The solute is always a liquid.
the solute is the material that dissolves.
The solute can be either substance in the solution.
The material present in the greatest amount is the solute
In this model what is being changed about the solution?
There is more solvent being added making it concentrated.
There is more solute being added making it concentrated.
There is heat being added to speed up the rate of dissolving.
There is nothing special about this model.
Indigestion and heartburn is causes by an over production of stomach acid. If you were suffering from indigestion, what types of foods should you avoid?
Foods that have a pH BELOW 7.
Food that have a pH ABOVE 7.
Food that have a pH of 7.
Food has no impact on indigestion.
The table shows the pH of a sample of substances. Which of the basic items would be the best conductor of electricity.
Stomach acid
Oven cleaner
Eggs
Milk
Acids will neutralize a base, and bases will neutralize acids. If you add a base to a solution containing a strong acid, what will happen to the pH of the solution?
The pH will increase.
The pH will decrease.
The pH will stay the same.
After studying acids and bases you notice something in your kitchen has a bitter taste and is slippery to the touch. Since you don't have pH strips to test this substance you can use the properties to make an educated guess that this substance is...
...an acid.
...a base.
...a salt.
...a hydrate.
We used pH strips as the indicators in our household acid and base substance test. We also talked about litmus papers as another type of indicator. What property changes on the pH strip or litmus paper to show if an substance is an acid or base?
Smell.
Color.
Concentration.
Taste.
You can buy salt in different forms - granulated (like what you have on your table), course ground (kosher salt) and rock salt (for making ice cream).
If you used the rock salt as the solute in a rate of dissolving investigation, which of the following WOULD NOT increase the rate at which the rock salt would dissolve?
Crushing the solute.
Stirring the solution.
Heating the solution.
Increasing the amount of solute.
Solutions can be made from different combinations of solids, liquids and gases. Gold is a solid solution (alloy) made from different metals to increase strength and durability. Use the pie chart to determine what the solvent of a rose gold alloy would be.
Gold
Silver
Copper
Identify the solute
What is a mixture?
elements chemically combined
a combination of different substances
composed of one atom only
it is made of chemical
The air around is a mixture of gases.
True
False
It is a type of mixture that has the SAME COMPOSITION in every part.
Homogenous
Heterogeneous
Salad is an example of a _____________.
homogeneous mixture
heterogeneous mixture
This is a mixture of two or more substances in which one or more of these substances (solutes) is dissolved in another substance.
compound
element
solution
heterogeneous mixture
A compound consists of two or more elements chemically combined.
Look at the picture above. If the bucket were left outside on a hot day but brought inside before any evaporation occurred, how would the mass be affected?
There would be no mass.
The mass would be less.
The mass would be greater.
The mass would not be affected.
Which process changes matter into one or more new substances?
Physcial Change
Chemical Change
Which change only changes the appearance or look of matter?
Physcial Change
Chemical Change
Which changes are considered physical changes? (Pick all that apply.)
Folding paper
Painting a fence
Evaporating water
Melting ice
Rotting banana
Which changes are considered chemical changes? (Pick all that apply.)
Rusting
Tarnishing of silver
Digestion of food
Melting ice
Rotting banana
During the Fall, leaves changed on the trees. What sign of a chemical change is this?
Color change
Increase of light
The formation of a percipitate
Examine the data for each of the following experiment and answer the questions based on analysis of the data.
What is the mass of the reactants?
Does the data support the Law of Conservation of Mass?
80.6 g, yes
79.6 g, no
