SUBSTANCES AND MIXTURES

Question 1

What is the melting point of a
substance?

Answer 1

The temperature a substance
melts or freezes

Question 2

What do chemists use to heat
a substance slowly?

Answer 2

WATER BATH

Question 3

What is a solute?

Answer 3

A solid substance which dissolves in a solvent

Question 4

What is a solvent?

Answer 4

A substance in the liquid state which dissolves a
solute

Question 5

What is the mass of a
solution equal to?

Answer 5

mass of the dissolved solute + mass of the solvent

Question 6

What gives a solution
its properties?

Answer 6

A solution has of both the solvent and the solute

Question 7

Describe the movement of particles
in a liquid

Answer 7

move over each other

Question 8

Why can substances flow when liquid
but not when solid?

Answer 8

particles can move over each other in
liquid but not solid state.

Question 9

What state change happens when
a substance boils?

Answer 9

liquid to gas

Question 10

What is a suspension?

Answer 10

A cloudy mixture of a solid and a
liquid

Question 11

What is “Brownian motion”?

Answer 11

What is “Brownian motion”?

Question 12

What temperature will a liquid
evaporate at?

Answer 12

any temperature

Question 13

What technique can separate a
mixture of liquids?

Answer 13

distillation

Question 14

What state change happens when a
substance condenses?

Answer 14

gas to liquid