Chapter 5 Flashcards
s, What is chemical change?
A change in the orgininal substance, and more substances being produced in the process
What is a physical change?
When the substance stays the same and no new substances are being produced
What is a solution?
a uniform mixture of two or
more substances
(looks like a pure substance but it contains more than one type
of particle. clear apple juice)
What is a mixture?
a substance that is made up of
at least two different types of particles
What is a mechanical mixture?
a mixture in which
you can distinguish between different
types of matter
What is a pure substance?
A substance that is made up of only one particle
What is a physical property?
A characteristic of a substance that can be determined without altering the substance
What is a chemical property?
A characteristic of a substance that is determined when the substance is altered
What is qualitative property?
The property of a substance is that is not measured and has no numerical value ( color, odour, texture )
What is quantitative property?
The property of a substance that is measured and has numerical value ( temperature, height, mass )
Examples of physical change
Change of shape/size
Change of states (solid, liquid, gas)
Dissolving
Examples of chemical change
Change of color
Change of odour
Bubbles produced
Precipitates
Change in temperature/light
What are the properties of a solid?
Distance between particles are greater/closer
Attractive forces are greater
Speed of particles are slower
Particles are compressed
What are the properties of a liquid?
Distance between particles are greater than solid
Attractive forces are less than solids
Speed of particles are faster than solid
Particles are not compressed
What are the properties of a gas?
Distance between particles are far appart
The attractive forces are the least in this state
Speed of particles are very fast
There is no compression of particles
What is lustre?
shiniess or dullness
(a shiny spoon as high lustre)
What is clarity?
the ability to let light through
what is brittleness
breakability or flexibility
(glass is brittle and cracks easily)
what is viscosity
resistance of a liquid to flowing
low - pours quickly
high - pours slowly
what is hardness
the relative ability to scratch or be scratched by another substance (wax is hard)
malleability
ability of a substance to be hammered into thinner sheet or molded
(metal is malleable)
ductility
ability of a substance to be drawn (pulled) into a finer strand
(copper is ductile)
Conductivity
Ability of a substance to allow electricity to pass through it
(copper wires have high conductivity)
Solubility
ability of a substance th solute to form a solution into another substance
(salt + water = salt water)
