45_review_exam2_f14(1)

CHM 1045 Second Exam Review Sheet Stoichiomentry Balance equations Calculations of grams or moles of one substance to grams or moles of a different substance related through a balanced equation. Identify limiting reagent when grams of both substances are given or when volume and molarity of both substances are given. Substances must be related through a balanced equation. Calculations involving molarity (find molarity, moles, volume, or grams needed to prepare a solution) Given volume and molarity find grams of a product Identify type of reaction: precipitation, acid-base, or red-ox (know the type of redox reactions) Be able to predict product for each of the type of reactions (remember to write the correct chemical formula based first on the charges of the ions and then in a second step you will balance the equation) Identify oxidation numbers for an element in a chemical formula (calculate the total negative contribution and positive contribution from the other elements present in the chemical formula and then find t he number necessary to make it neutral; t hat is the oxidation number of the element being asked) Write net ionic equations Remember to ionize only strong electrolytes (strong acids, strong soluble bases and soluble salts) Need to kn ow solubility rules (conc entrate on the always solubl e and mostly soluble ) Properties of strong, weak and non-electrolytes (conduction o f electricity) Know your strong acids, strong soluble bases, soluble salts. Know the exceptions for solubility of halides and sulfates Based on provided activity series predict who is th e strongest or weakest oxidizing or reducing agent What were the contributions of: Planck; Einstein; Bohr; Rydberg; De Broglie; Electromagnetic radiation relation between energy, frequency, and wavelength order of strength between the different ty pes of rad iation (from gamma to radio wav es) Calculations of Energy, frequency, or wavelength (careful with the units) Calculations of the above for an electron located in a specific energy level Quantum numbers What each represents How to find the values for a specific electron Values allowed and not allowed Electronic distribution or configuration for neutral elements or ions Trends in the periodic table, predict: Atomic or ionic size Ionization energies (1 st , 2 nd , etc) Identify an element or family based on a series of ionization energies (1 st , 2 nd , etc) Electron affinity ( most negative versus most positive values) Electronegativity Lattice energy Z eff - how does effective nuclear charge controls the above trends. Metallic Character

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Transcript of 45_review_exam2_f14(1)

CHM 1045

Second Exam

Review Sheet

Stoichiomentry

Balance equations

Calculations of grams or moles of one substance to grams or moles of a different substance related through a

balanced equation.

Identify limiting reagent when grams of both substances are given or when volume and molarity of both

substances are given. Substances must be related through a balanced equation.

Calculations involving molarity

(find molarity, moles, volume, or grams needed to prepare a solution)

Given volume and molarity find grams of a product

Identify type of reaction: precipitation, acid-base, or red-ox (know the type of redox reactions)

Be able to predict product for each of the type of reactions

(remember to write the correct chemical formula based first on the charges of the ions and then in a

second step you will balance the equation)

Identify oxidation numbers for an element in a chemical formula

(calculate the total negative contribution and positive contribution from the other elements present in the

chemical formula and then find the number necessary to make it neutral; that is the oxidation number of the

element being asked) Write net ionic equations

Remember to ionize only strong electrolytes (strong acids, strong soluble bases and soluble salts)

Need to know solubility rules (concentrate on the always soluble and mostly soluble)

Properties of strong, weak and non-electrolytes (conduction of electricity)

Know your strong acids, strong soluble bases, soluble salts.

Know the exceptions for solubility of halides and sulfates

Based on provided activity series predict who is the strongest or weakest oxidizing or reducing agent What were the contributions of:

Planck; Einstein; Bohr; Rydberg; De Broglie;

Electromagnetic radiation

relation between energy, frequency, and wavelength

order of strength between the different types of radiation (from gamma to radio waves)

Calculations of Energy, frequency, or wavelength (careful with the units)

Calculations of the above for an electron located in a specific energy level

Quantum numbers

What each represents

How to find the values for a specific electron

Values allowed and not allowed

Electronic distribution or configuration for neutral elements or ions

Trends in the periodic table, predict:

Atomic or ionic size

Ionization energies (1st, 2

nd, etc) Identify an element or family based on a series of ionization energies

(1st, 2

nd, etc)

Electron affinity ( most negative versus most positive values)

Electronegativity

Lattice energy

Zeff - how does effective nuclear charge controls the above trends. Metallic Character

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Transcript of 45_review_exam2_f14(1)