TEST 1

CHM 1045

REVIEW TOPICS

1. Significant Figures

2. Rounding Off

3. Scientific Notation

4. Operations with powers of ten (addition, subtraction, multiplication, division, raising to an exponent)

5. Conversions and meaning of units:

       a. Metric to Metric conversions

        b. English to Metric conversions

        c. Fractional or complex conversions

        d. Square and Cubic conversions

        e. Density and Specific gravity-density must be used as a conversion factor!

        f. Temperature Conversions

6. Heat and Specific Heat Capacity

7. Classification of Matter:

     a. Pure Substances: Elements vs. Compounds

     b. Mixtures: Homogeneous vs. Heterogeneous

8. Physical and Chemical changes/properties

9. Names and symbols of elements.in IA-VIIIA, Period 4, and

10. Subatomic Particles: protons, electrons, neutrons, atomic number and mass number.

11. Isotopes:

     a. Determining numbers or protons, neutrons and electrons based on the isotope symbol.

     b. Working with the formula for weighed average atomic weight of an element and weights of individual isotopes and percent abundance.

     c. Know how to determine number of protons, neutrons and electrons given the isotope symbol for an ion.

12. Allotropes

13. The mole and conversions using moles, grams, atoms, molecules

14. Conversions between grams/moles/particles of a compound and of an element in the compound using the ration of elements from the formula.

12. Percent Composition-calculating and using %.

13. Empirical Formulas from grams and from %.

14. Molecular formulas from empirical formula and molar mass.

15. Empirical Formulas from combustion analysis data.

      a. Determining % of an element by reaction to give weight of a compound that contains the element. e.g. %Cl if given amount of AgCl obtained after reaction

          with AgNO3.

     b. Determining empirical formula when given weight of CO2 obtained from a given amount of a hydrocarbon (CxHy).

16. % purity calculations and using % purity as a conversion factor.

17. Determining % purity of a hydrate from data obtained from heating the hydrate.

18. Know charges of ions formed from metals with fixed charge and nonmetals (nonmetals always have fixed charges) and know which metals have variable charges.

19. Be able to criss-cross and simplify formulas to come up with ionic formulas.

20. Know how to name binary covalent and ionic compounds and ternary ionic compounds with some simple polyatomic ions such as sulfate, sulfite, nitrate, carbonate, acetate, phosphate and hydroxide.

21. Know the names of changes in physical state and the names of the temperatures at which the changes occur. Also how you can go from one to another (change temperature or pressure and in which direction).