638 Answered Questions for the topic AP chemistry

Ap Chemistry Chemistry

08/11/19

Calculate the concentrations of each ion remaining in solution after the precipitation is complete.
The precipitation reaction involves 75.0 mL of .0750 M solution of potassium phosphate and 75.0 mL of .0750 M iron (II) acetate.I'm very confused as to how to find the concentration of the... more
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Ap Chemistry Science Chemistry

08/11/19

Which of the following solutions of strong electrolytes contains the largest number of ions?
50.0 mL of .175 M NaOH, 100.0 mL of .250 M BaCl2, or 250.0 mL of .050 M Na3PO4?I would really appreciate if you could explain what to do in order to determine which solution contains the most... more
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Ap Chemistry Chemistry

08/04/19

Consider the combustion of 30.0 g of propane in excess oxygen. Write the balanced molecular equation for this reaction and find the maximum mass of H2O that can form
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Ap Chemistry Chemistry

05/27/19

Concentration of the solute species?
What are the concentrations of all the solute species in 0.350 M lactic acid, HC3H5O2? This acid has ka = 1.4 x 10-4
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Ap Chemistry Chemistry

05/27/19

Stronger base h or a
Given that the ka = 1.8 x 10-5 for acetic acid and the ka = 3.5 x 10-8 for hypchlorous acid, which is the stonger base, hypochlorite or acetate?
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Ap Chemistry Chemistry

05/27/19

Justifying and selecting indicator
Select and justify a good indicator for the following titration:When 25 mL of 0.10 M formic acid (HCHO2) is titrated with 0.10 M NaOH.
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Ap Chemistry Chemistry

05/27/19

Ka for ammonium
Ammonia, NH3, has a kb = 1.8 x 10-5. What is the Ka for ammonium?
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Ap Chemistry Chemistry

05/27/19

Ka expression for an ionization
What would be the ka expression for the ionization of acetic acid (a weak acid).
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Ap Chemistry Chemistry

05/27/19

Writing chemical equations
Write the chemical equation for the first and second ionization of sulfuric acid (a strong acid)
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Ap Chemistry Chemistry

05/27/19

Calculating molar concentrations
Calculate the molar concentrations of H+ and OH- in solutions that have a pH = 8.26
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Ap Chemistry Chemistry

05/27/19

Calculating the pH of a solution
Calculate the pH of a solution where [H+] = 3.6 x 10-4
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Ap Chemistry Chemistry

05/27/19

Calculating OH- in a solution
Calculate the [OH-] in a solution in which the [H3O+] = 4.2 x 10-9 M
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Ap Chemistry Chemistry

05/27/19

Conjugate acid-base pairs
Identify the conjugate acid-base pairs in the following reaction:HCO3− (aq) + H2O (l) ↔H2CO3 (aq) + OH− (aq)
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Ap Chemistry Chemistry

05/27/19

Conjugat acid-base pairs
Identify the conjugate acid-base pairs in the following reaction:H2O (l) + H2O (l) ↔ H3O+ (aq) +OH− (aq)
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Ap Chemistry Chemistry

05/27/19

Equilibrium constant value
A galvanic cell is based on the following half- reactions:Cu+2 (aq) + 2e- à Cu (s)                  ɛ° = 0.34 VV+2 (aq) + 2e- à V (s)                   ɛ° = -1.20 VIn this cell, the copper... more
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Ap Chemistry Chemistry

05/26/19

Concentration of H+
HA is a weak, monoprotic acid that dissociated according to the equation:HA (aq) ßà H+ (aq) + A- (aq)                  Ka = 4.0 x 10-9If the initial concentration of HA is 0.10 M, find the... more
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Ap Chemistry Chemistry

05/26/19

Molarity of the copper (I) hydroxide
A student uses acetic acid to titrate a solution of copper(I) hydroxide to determine the concentration of the copper (I) hydroxide. If 30.0 mL of 0.250 M acetic acid is needed to neutralize 15.0 mL... more
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Ap Chemistry Chemistry

05/26/19

Galvanic cell based on half-reactions
A galvanic cell is based on the following half- reactions:Cu+2 (aq) + 2e- à Cu (s)            ɛ° = 0.34 VV+2 (aq) + 2e- à V (s)                   ɛ° = -1.20 VIn this cell, the copper compartment... more
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Ap Chemistry Science Chemistry

05/19/19

Please provide answer and if possible explanation
In the decomposition of ammonia on a platinum surface at 856 oC, 2NH3(g) → N2(g) + 3H2(g), changing the concentration of NH3 has no effect on the rate. Which unit below is the correct unit for the... more
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Ap Chemistry Chemistry Chem Ap Chem

05/08/19

Why is a calcium atom larger than a magnesium atom?
Please help explain in terms of not just periodic trends.
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Ap Chemistry Chemistry

04/18/19

If 13 liters of nitrogen gas went into the reaction and hydrogen was unlimited, how many grams of ammonia were produced?
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Ap Chemistry Chemistry

03/24/19

A 6.0 g sample of carbon is burned to produce carbon dioxide. The yield from the reaction is 60%. How much carbon dioxide was actually produced?
 a13 g b44 g c3.6 g d22 g
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Ap Chemistry Chemistry

03/24/19

CHEMISTRY PROBLEM
50.0 mL of 0.10 M sodium chloride (NaCl) solution is mixed with 25.0 mL of 0.25 M silver nitrate (AgNO3) solution. After filtering and drying the product. 0.20 g of silver chloride was... more
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Ap Chemistry Chemistry

03/24/19

Chemistry help!!!
Consider the following reaction taking place in a container fitted with a movable piston.2 SO2(g) + O2(g) → 2 SO3(g)Suppose we place two moles each of SO2 and O2 in the reaction vessel at 25oC and... more
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Ap Chemistry Chemistry

03/23/19

The given molar mass for silver is 108 g/mol and for nitric acid is 63 g/mol. Which of the following determines teh minimum volume in (mL) of 8.0 M HNO3 needed to dissolve 2.0 g of silver metal?
how would i solve this????
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