mixtures

Question 1

What is a solution?

Answer 1

Solution is a mixture formed when a solid dissolves in a liquid.
example: sugar and water

Question 2

What is a solvent?

Answer 2

Solvent is a liquid in which other substances will dissolve
example: water and alcohol

Question 3

What is a solute?

Answer 3

Solute is the substance that dissolves in the solvent.
example:sugar and salt

Question 4

what happens to the sugar particle when the cube dissolves?

Answer 4

the sugar crystal is visible. as the water particles vibrate and slide past one another they bump into the vibrating sugar particle, the movement helps to separate the sugar particles and they get mixed up with the water particles.

Question 5

what is a concentrated solution?

Answer 5

a solution in which a great mass of solute is dissolved.

Question 6

what is A dilute solution

Answer 6

a solution in which a small mass of solute is dissolved.

Question 7

what is soluble?

Answer 7

a solid that will dissolve in a solvent such as sodium chloride and sugar.

Question 8

what is insoluble?

Answer 8

a solid that will not dissolve in a solvent such as iron.

Question 9

what is saturated?

Answer 9

a solution in which no more of the solid will dissolve.

Question 10

what is solubility?

Answer 10

how soluble a substance is.

Question 11

what is variable?

Answer 11

factors that can be changed in an investigation.

Question 12

what is independent variable?

Answer 12

the variable that you change

Question 13

what is dependent variable?

Answer 13

the variable that you measure

Question 14

what is control variable?

Answer 14

the variable that you keep the same

Question 15

what is range?

Answer 15

the highest minus the lowest.

Question 16

what is interval?

Answer 16

the difference between two things.

Question 17

what is chromatography

Answer 17

a technique to separate out colored inks. chromatogram is the resulting the image on the paper.

Question 18

what is solvent front?

Answer 18

used in chromatography and is the level the solvent has reached as it travel up the paper.

Question 19

all solutions are transparent but don’t mean colorless.

Question 20

The difference between dissolving and melting is?

Answer 20

dissolving needs two substances but melting only needs one substance.
For example: ice cream melting, sugar in black tea.

Question 21

equation for solution:

Answer 21

mass of solution=mass of solute + mass of solvent

Question 22

the mass has been conserved means the mass has stayed the same.
for example: the mass of the salt (solute) is 9 grams, the mass of the water (solvent) is 50 grams, what is the mass of the solution?
the mass of solution is 9 + 50=59

Question 23

The process of separating dissolved liquids using proper chromatography:

Answer 23

A pencil line is drawn, and spots of ink or plant dye are placed on it. There is a container of solvent, such as water or ethanol.
The paper is lowered into the solvent. …
As the solvent continues to travel up the paper, the different coloured substances spread apart.