Chemistry

Properties 1

100

What is a qualitative property? Provide an example. 

A property described with words. For example, the material was smooth.

200

Ductility is a (physical/chemical) property.

Physical

300

What does lustre define?

How much light an object will reflect (high lustre=shiny, low lustre=dull)

400

Hardness is defined as?

An objects resistance to being scratched.

Properties 2

100

A quantitative property is? Provide an example.

A property measured and described with numbers. For example, the melting point of water is 100^oC

200

Viscosity is...

The resistance of a fluid to flowing.

300

Something with a high viscosity flows (faster/slower)?

Slower. For example, the viscosity of honey is higher than the viscosity of water.

400

What physical property describes materials as solid, liquid or taking the shape of a container (gas).

State of matter.

Properties 3

100

Knowing the properties of a substance is important because...

The properties of a substance can:
-Help us identify use for materials
-Help us identify the presence of a substance
-Help us identify hazards
-Help separate a substance from a mixture

200

Chemical properties...

Describe how matter behaves when it goes through a chemical change (reaction).

300

A material is malleable. What does this mean?

It can be hammered or pressed into different shapes without cracking.

400

"Nitrogen is an inert gas" is an example of a (physical/chemical) property?

Chemical property

Density

100

Density is defined as...

The amount of matter (mass) that a substance contains per unit volume. 

200

The equation for density is...

d=m/v

300

Water has a density of 1000 g/L. What would the mass of 1000mL of water be?

d=m/v

1000mL = 1 L

m=dv
   = (1000g/L)(1L)
   =1000 g

400

A chamber holds 500g of gas with a density of 25 g/L. Calculate the volume.

d=m/v

v=m/d
  =500g/25g/L
  =20L

Density/Solubility

100

What is a solvent?

The substance that dissolves a solute. 

200

Solubility is defined as...

The ability of a solute to dissolve in a solvent.

300

Describe solubility using an example (include solute, solvent, solution).

Water (solvent) dissolves salt (solute) to create a homogenous mixture (solution) of salt and water.

400

A rectangular object has a mass of 24g. Its length is 5.0cm, its width 5.0cm and its height 0.25cm. Calculate its density.

v=LxWXH
  =5cm X 5cm X 0.25cm
  =6.25cm³

d=m/v
  = 24g/6.25cm³
  =3.84g/cm³