Question

sch4c: chemistry, grade 12, college preparation
unit 1: matter and qualitative analysis
matter review

1. place a check mark in the appropriate box that best classifies the matter

substance element compound mechanical mixture solution
oxygen
food colouring in water
salt
beach sand
copper pipe
sugar

1. identify the property of matter each description below is referring to.

description property
1 the amount of sugar dissolved in water.
2 the temperature at which a solid turns to a liquid.
3 the amount of mass in a given volume of substance.
4 the ability to dent or hammer a metal.
5 a substances ability to transfer heat or electricity.
6 the ability of one substance to scratch another substance (diamonds scratch glass).
7 the description of a whether a substance is a solid liquid or gas.
8 the ability to pour or flow

Explanation:

Step1: Classify substances in first table

• Oxygen is an element as it consists of only one - type of atom.
• Food colouring in water is a solution as the food - colouring dissolves in water.
• Salt (sodium chloride) is a compound as it is made up of two or more different elements chemically combined.
• Beach sand is a mechanical mixture as it contains different substances like quartz, feldspar etc. that are not chemically combined.
• Copper pipe is made of copper, which is an element.
• Sugar (sucrose) is a compound as it is composed of carbon, hydrogen, and oxygen atoms chemically bonded.

Step2: Identify properties in second table

• The amount of sugar dissolved in water refers to solubility.
• The temperature at which a solid turns to a liquid is the melting point.
• The amount of mass in a given volume of substance is density.
• The ability to dent or hammer a metal is malleability.
• A substance's ability to transfer heat or electricity is conductivity.
• The ability of one substance to scratch another substance is hardness.
• The description of whether a substance is a solid, liquid, or gas is the state of matter.
• The ability to pour or flow is fluidity.

Answer:

Substance	Element	Compound	Mechanical mixture	Solution
Food colouring in water				√
Salt		√
Beach sand			√
Copper pipe	√
Sugar		√

Description	Property
The temperature at which a solid turns to a liquid	Melting point
The amount of mass in a given volume of substance	Density
The ability to dent or hammer a metal	Malleability
A substances ability to transfer heat or electricity	Conductivity
The ability of one substance to scratch another substance (diamonds scratch glass)	Hardness
The description of a whether a substance is a solid liquid or gas	State of matter
The ability to pour or flow	Fluidity