Chemistry Topic 1, 2 and 3

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T1- Arrangement, movement and energy in solid
Regular (lattice) formation. atoms close together, fixed. Vibrate around their position. Lower kinetic energy of particles
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T1- Arrangement, movement and energy in liquid
Weak forces of attraction. Irregular formation. Atoms are touching Random movement of atoms (constant.) Have more kinetic energy than solids.
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T1- Arrangement, movement and energy in gas
Very weak forces of attraction. atoms travel in straight lines. Far apart, not touching. Vibrate rapidly. High kinetic energy.
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Heat energy is supplied in which processes?
Melting and evaporating.
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T1-Heat energy is given out in which processes?
Condensing and freezing.
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T1-Comment on the mass and charge of protons, neutrons and electrons
Protons: Mass 1, charge +1. Neutrons: Mass-1, charge 0. Electrons: mass: 1/1836, charge -1.
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T1-Why do ATOMS have no charge?
In an atom, number of protons= number of electrons.
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T1-What does the mass number consist of?
number of Protons + neutrons
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T1-What does the atomic number consist of?
The number of protons or electrons
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T2- Define diffusion
Movement of particles from an area of higher concentration, to an area of lower concentration, through a fluid substance.
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T2- How can you demonstrate diffusion through a liquid.
Potassium manganate (VII) and water. Bright purple crystals will spread due to random movement of liquids.
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T2- Will ammonia or hydrochloric acid diffuse faster and why?
Ammonia, as the molecule has a lower molar mass. (lighter)
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T2- Describe the properties of bromine gas, and what will it do in air?
Bromine- brown, strong smelling gas. Slowly diffuse through the air.
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T2- What is the equation for working out enthalphy change using bond energies
enthalpy change = Total energy absorbed to break bonds (reactants) - total energy released in making new bonds. (products)
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T3- Differences between mixtures and compounds
Mixtures are not chemically bonded, whereas compounds are. Mixtures are easily separated by physical methods, unlike compounds
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T3-When can filtration be used? Method?
to separate an Insoluble solid from a liquid. FILTER PAPER, FUNNEL AND BEAKER.
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T3-When can crystallisation be used? Method?
to separate a Soluble solid from a liquid. Heat solution in evaporating dish until crystals start to form. Remove from heat and leave in warm place for solvent to evaporate. Dry in dessicator.
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T3-What can be done to separate rock salt ( salt and sand)?
Grind, then mix with water and the salt will dissolve. Then FILTER sand out. Then CRYSTALLISE the salt.
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Other cards in this set

Card 2

Front

T1- Arrangement, movement and energy in liquid

Back

Weak forces of attraction. Irregular formation. Atoms are touching Random movement of atoms (constant.) Have more kinetic energy than solids.

Card 3

Front

T1- Arrangement, movement and energy in gas

Back

Preview of the front of card 3

Card 4

Front

Heat energy is supplied in which processes?

Back

Preview of the front of card 4

Card 5

Front

T1-Heat energy is given out in which processes?

Back

Preview of the front of card 5
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