Question 1

How can you tell when a chemical reaction has occurred?

Accepted Answer

A new material forms.

Answer

The materials sink to the bottom of the container they are being mixed in.

Answer

The materials dissolve.

Question 2

How do you know when a solid and liquid have made a solution?

Accepted Answer

The solid disappears and mixes into the liquid.

Answer

The solution fizzes and bubbles.

Answer

The solid sinks to the bottom of the container.

Answer

The material floats to the top of the liquid after stirring.

Question 3

How much does 50ml of water weight?

Accepted Answer

50 g

Answer

40 g

Answer

100 g

Answer

5 g

Question 4

How do you know when a solution has become saturated?

Accepted Answer

When the solid material will not dissolve anymore.

Answer

When the solid material evaporates.

Answer

When you shake the solution.

Answer

When the solid material dissolves.

Question 5

How can you separate a solution of salt and water?

Accepted Answer

Evaporate the solution to let the water turn into air and leave salt crystals behind.

Answer

Use a screen like we used in class.

Answer

Use a filter to separate the  salt and water.

Question 6

When a chemical reaction occurs, what do we call the new material that forms?

Accepted Answer

Precipitate

Answer

crystal

Answer

solvent

Answer

solute

Question 7

When you open a can of soda and it fizzes, is that a chemical reaction?

Accepted Answer

No

Answer

Yes

Question 8

What is a SOLUTE?

Accepted Answer

The solid material that we put in a liquid.

Answer

The substance that the solid material will dissolve into.

Question 9

What is a SOLVENT?

Accepted Answer

The substance that the solid material dissolves into.

Answer

The solid material that we put in a liquid.

Question 10

More concentrated solutions weight...

Accepted Answer

More

Answer

Less

Answer

The same as they started.

Question 11

How do you know if you have a mixture or solution?

Accepted Answer

Mixtures can be easily separated with a screen or filter.

Answer

Mixtures and solutions are exactly the same.

Answer

Solutions look the same as a mixture.

Question 12

Are all solutions mixtures?

Accepted Answer

Yes

Answer

No

Question 13

Can a mixture be separated?

Accepted Answer

Yes

Answer

No

Question 14

Can a solution be separated?

Accepted Answer

Yes

Answer

No

Question 15

Is there a way to separate a dry mixture of salt, powder, and gravel?

Accepted Answer

Yes

Answer

No

Question 16

What is the shape and pattern of a salt crystal?

Accepted Answer

Square with an X

Answer

Square with a +

Answer

Jagged Edges

Answer

Square with an O

Question 17

Is there a limit to the amount of salt that can dissolve in water?

Accepted Answer

Yes

Answer

No

Question 18

How can you determine which of the two salt solutions are more concentrated?

Accepted Answer

Weigh both solutions and compare them to each other and plain water.

Answer

Shake the solutions in a bottle first.

Answer

Add more salt and stir to determine if the salt dissolves.

Answer

Mix the two solutions together and then weigh equal parts of the solution.

Question 19

What happened in our Kool Aid lab when we added more powder to the same amount of water?

Accepted Answer

The Kool Aid became darker, sweeter, and more concentrated.

Answer

The Kool Aid showed a chemical reaction.

Answer

The Kool Aid tasted better.

Question 20

What does Saturation mean?

Accepted Answer

When a material can no longer be mixed in or dissolve in to a substance.

Answer

The concept of separating solutions.

Answer

The solution weighs more and has more material mixed in to it.

Question 21

What does concentration mean?

Accepted Answer

The amount of a material in a solution or substance.

Answer

How much a solution can hold.

Answer

When a solid material dissolves.

Question 22

What is solubility?

Accepted Answer

The ability for a solute to dissolve in a solvent.

Answer

When there is more volume in a solution.

Question 23

There is a mystery solution that I am not sure what it is made of. How can I identify what has been dissolve in this liquid?

Accepted Answer

Evaporate the liquid out and examine the properties of the crystals that form.

Answer

Weigh the solution to determine if it is heavier than plain water.

Answer

Add baking soda and see if there is a chemical reaction.

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