AP Chemistry Exam Practice Test 2022

Which molecule or ion in the following list has the greatest number of unshared electron pairs around the central atom?

What types of hybridization of carbon are in the compound acetic acid, CH₃COOH?

• I. sp³
• II. sp²
• III. sp

 The critical point on a phase diagram represents

This is why acetic acid molecules exist as dimers in the gaseous phase

Which point on the following diagram represents the triple point?

A solution is prepared by dissolving 0.500 mol of NaCl in 500.0 g of water. Which of the following would be the best procedure to determine the molarity of the solution?

A chemist needs 800 mL of a 0.50 M bromide ion, Br −, solution. She has 800 mL of a 0.20 MKBr solution. How many moles of solid MgBr2 will she need to add to increase the concentration to the desired value?

A solution of pentane, C₅H₁₂, in carbon tetrachloride, CCl₄, is nearly ideal. The vapor pressure of pentane is 450 mm Hg at 20°C, and the vapor pressure of carbon tetrachloride is 87 mm Hg at this temperature. What is the mole fraction of carbon tetrachloride in the vapor over an equimolar solution of these two liquids?

How many grams of HNO₃ (molecular weight 63.0) are in 500.0 mL of a 5.00 M solution?

Which of the following aqueous solutions would have the greatest freezing point depression?

Step 1: 2 NO₂(g) → N₂(g) + 2 O₂(g)
Step 2: 2 CO(g) + O₂(g) → 2 CO₂(g)
Step 3: N₂(g) + O₂(g) → 2 NO(g)

The above represents a proposed mechanism for the reaction of NO2 with CO. What are the overall products of the reaction?

The difference in energy between the transition state and the reactants is

The table below gives the initial concentrations and rates for three experiments.

The reaction is 2ClO₂(aq) + 2OH⁻(aq) → ClO₂⁻(aq)+ ClO₃⁻(aq) + H₂O(l). What is the rate law for this reaction?

Which of the following CANNOT behave as both a Brønsted base and a Brønsted acid?

A species, molecule, or ion is called a Lewis base if it does which of the following?

Using the above information, choose the best answer for preparing a pH = 8.5 buffer.

What is the ionization constant, K_a, for a weak monoprotic acid if a 0.5-molar solution has a pH of 5.0?

Determine the OH−(aq) concentration in 0.0010M pyridine (C₅H₅N) solution. (The Kb for pyridine is 9 × 10⁻⁹.)

What is the equilibrium constant for the above reaction? The successive acid dissociation constants for H₂S are 9.5 × 10⁻⁸(K_a1) and 1 × 10⁻¹⁹
(Ka₂). The K_sp, the solubility product constant, for SnS equals 1.0 × 10⁻²⁵

An equilibrium mixture of the compounds is placed in a sealed container at 150°C. The amount of the product may be increased by which of the following changes?

I. Adding 1 mole of Ar(g) to the container
II. Increasing the volume of the container
III. Raising the temperature of the container

What is the coefficient of H⁺ when the above reaction is balanced?

How many moles of Au may be deposited on the cathode when 0.60 Faradays of electricity is passed through a 1.0 M solution of Au³⁺?

The reaction shown above was used in an electrolytic cell. The voltage measured for the cell was not equal to the calculated E° for the cell. This discrepancy could be caused by which of the following?

Choose the correct statement from the following list

If a current of 0.60 amperes is passed through the electrolytic cell for 0.75 hours, how should you calculate the grams of S₂O₃²⁻ formed?

When  Ra decays, it emits 2 α particles, then a β particle, followed by an α particle. The resulting nucleus is:

Which of the following lists the types of radiastion in the correct order of increasing penetrating power?

Alkenes are hydrocarbons with the general formula C_nH_2n. If a 1.40-g sample of any alkene is combusted in excess oxygen, how many moles of water will form?

What type of compound is shown below?