AP Chemistry Warm-up for April 27

Review Problem

Calculate ΔH for the first reaction using the thermochemical information from the other three reactions.

ZnO + CO2 → ZnCO3                 ΔH = ?

H2CO3 → H2O + CO2             ΔH =  62 kJ

Zn(OH)2 → ZnO + H2O                 ΔH =  72 kJ

Zn(OH)2 + H2CO3 → 2H2O + ZnCO3                      ΔH =  117 kJ

April 27th, 2012 | Category: AP Chemistry, AP Chemistry Warmup | Comments are closed

AP Chemistry Warm-up for April 25

Reaction Problems

Write and balance net ionic equations for each of the following reactions:

  1. Aqueous solutions of sodium phosphate and copper(II) nitrate are mixed

  2. Solid potassium oxide is added to pure water

  3. An aqueous solution of potassium bicarbonate is added to a dilute aqueous solution of sulfuric acid

April 25th, 2012 | Category: AP Chemistry, AP Chemistry Warmup | Comments are closed

First Five for April 23 and 24

California Standards Factoids

Chemical processes that release thermal energy are called ______________________.  Chemical processes that  absorb thermal energy are called ______________________.

Catalysts increase the reaction rate by lowering _______________________   ________________.

Equilibrium is established when forward and reverse reaction rates are _____________.

Acids are hydrogen-ion-____________________ and bases are hydrogen-ion-_____________________ substances.

The ____________________ motion of molecules and their collisions with a __________________ create the observable pressure on that surface.

Students know _____________  ______________  are the building blocks of proteins.

Protons and neutrons in the nucleus are held together by __________________ forces.

April 23rd, 2012 | Category: Chemistry, First Five | Comments are closed

AP Chemistry Warm-up for April 23

Review Problem

Identify which of the following sets of quantum numbers are not possible.

  • (1, 0, 1, +½)

  • (2, 1, -1, -½)

  • (4, 4, -2, -½)

  • (3, 2, 2, -½)

  • (3, 2, -3, +½)

  • (1, 1, 1, +½)

April 23rd, 2012 | Category: AP Chemistry, AP Chemistry Warmup | Comments are closed

First Five for April 19 and 20

California Standards Factoids:

There is no temperature lower than ________________

The quantity “one mole” is defined by the number of atoms in ________ grams of _________________ – ____.

Standard temperature is _________°C and __________ K.

The nucleus of the atom is much _________________ than the atom yet contains most of its ____________.

Students know chemical bonds between atoms in molecules are ______________________.

Students know one mole equals ___________________ particles (atoms or molecules).

 

April 19th, 2012 | Category: Chemistry, First Five | Comments are closed

AP Chemistry Warm-up for April 19

Review Problem

Write electron configurations and dot notations for the following elements:

  • Silicon, Si

  • Chromium, Cr

  • Cesium, Cs

  • Californium, Cf

April 19th, 2012 | Category: AP Chemistry, AP Chemistry Warmup | Comments are closed

First Five for April 17 and 18

2 liters of a gas exerts a pressure of 2 atmospheres when the temperature is 27°C. What volume will the gas occupy at a pressure of 1 atm and a temperature of 327°C?

April 17th, 2012 | Category: Chemistry, First Five | Comments are closed

AP Chemistry Warm-up for April 17

Review Problem

  1. Write the balanced equation for the combustion of isopropyl alcohol, C3H7OH

  2. Calculate the molar heat of combustion of isopropyl alcohol, given the following standard heat of formation data:

  • ΔHf° C3H7OH(l) = –318.2 kJ/mol

  • ΔHf° CO2(g) = –393.5 kJ/mol

  • ΔHf° H2O(g) = –242 kJ/mol

April 17th, 2012 | Category: AP Chemistry, AP Chemistry Warmup | Comments are closed

AP Chemistry Warm-up for April 16

Review Problem

Write balanced compound formulas for each of the following:

  • ammonium oxalate

  • potassium nitrite

  • calcium borate

  • phosphorus acid

  • lead(II) dichromate

  • magnesium oxalate

  • lithium thiocyanate

April 16th, 2012 | Category: AP Chemistry, AP Chemistry Warmup | Comments are closed

First Five for April 16

Which of the following elements would be expected to have properties most similar to calcium (#20)?

Barium (Ba), Potassium (K), Scandium (Sc), Aluminum (13)

Calcium is classified as a(n):

alkali metal, noble gas, nonmetal, transition metal, alkaline earth metal

April 16th, 2012 | Category: Chemistry, First Five | Comments are closed
 
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