General definitions Mole Homogeneous mixture Heterogeneous mixture Pure Substances Compounds Chemical Change Chemical Property Physical Change Physical Property Solid Liquid Gas Evaporation ID: 792265
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Slide1
IB Chemistry 2015-2016
Topics for Test #1
Slide2General definitions
Mole
Homogeneous mixture
Heterogeneous mixture
Pure Substances
Compounds
Chemical Change
Chemical Property
Physical Change
Physical Property
Solid
Liquid
Gas
Evaporation
Sublimation
Deposition
Condensation
Freezing
Slide3Naming and Writing Chemical Formulas
Write formulas for the following substances:
a
. Barium sulfate
b
. Ammonium
chloride
c
. Chlorine monoxide
d
. Silicone
tetrachloride
e. Magnesium fluoride
Write the names for the following substances:
a. CuSO
4
b. PCl
3
c. Li
3
N
d. BaSO
3
e. N
2
F
4
Slide4Writing chemical equations
For example:
Solutions of silver nitrate and magnesium iodide are combined
.(This
is a double replacement reaction
.)
2AgNO
3
(
aq
) + MgI
2
(
aq
)
2AgI(s) + Mg(NO
3
)
2
(
aq
)
1. Ammonium sulfate reacts with barium nitrate.
2. Zinc metal is added to a solution of copper (II) chloride.
3. Propane gas (C
3
H
8
) is burned in excess oxygen
Slide5Mass Percent and Empirical Formulas
1)
N2O4
2) N2O
3)
Benzene contains only carbon and hydrogen and has a molar mass of 78.1 g/mol.
Analysis shows
the compound to be 7.74% H by mass. Find the empirical and molecular formulas of
benzene.
Slide6Limiting Reagents
4) Hydrogen gas and bromine gas react to form hydrogen bromide gas.
a
. Write a balanced chemical equation for this
reaction
.
b
. 3.2 g of hydrogen gas and 9.5 g of bromine gas
react
. Which is the limiting reagent?
c. How many grams of hydrogen bromide gas can be produced using the amounts in (b)?
d. How many grams of the excess reactant is left unreacted
?