04/26/24

General Chemistry 2 Equilibrium Equation
Determine if the following salt is neutral, acidic or basic. If acidic or basic, write the appropriate equilibrium equation for the acid or base that exists when the salt is dissolved in aqueous... more
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04/26/24

Calculate the solublity for Ca_3(PO_4 )_2 given a Ksp = 0.0000120
Calculate the solublity for Ca_3(PO_4 )_2 given a Ksp = 0.0000120
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04/26/24

Calculate the solublity for PbCrO_4 given a Ksp = 0.0000109 in a 0.176 M Na_2CrO_4 solution
Calculate the solublity for PbCrO_4 given a Ksp = 0.0000109 in a 0.176 M Na_2CrO_4 solution
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04/26/24

Calculate the molar solublity for PbF_2 given a Ksp= 0.000000347 in a 0.397 M Pb(NO3)_2 solution
Calculate the molar solublity for PbF_2 given a Ksp= 0.000000347 in a 0.397 M Pb(NO3)_2 solution
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04/26/24

Calculate the solublity for Al (OH)_3 given a Ksp= 0.0000000000106 in a buffered solution with pH= 12.3
Calculate the solublity for Al (OH)_3 given a Ksp= 0.0000000000106 in a buffered solution with pH= 12.3
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04/24/24

Calculate the pH when 30.0 mL of 0.200 M HBr is mixed with 30.0 mL of 0.400 M CH₃NH₂ (Kb = 4.4 × 10⁻⁴).
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04/24/24

What is the final [H⁺] if 1.00 L of 0.0550 M HCl is mixed with 1.00 L of 12.0 M acetic acid (Ka for CH₃COOH is 1.80 × 10⁻⁵)?
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04/24/24

Calculate the pH when 50.0 mL of 0.150 M KOH is mixed with 20.0 mL of 0.300 M HBrO (Ka = 2.5 × 10⁻⁹)
I cant figure out this one
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04/24/24

Calculate the percent by mass of benzene in a solution containing 10.4 g of benzene in 27.4 g of carbon tetrachloride.
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04/24/24

Calculate the freezing point and boiling point of a solution that contains 65.6 g NaCl and 42.4 g KBr dissolved in 750.3 mL H2O.
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04/24/24

A rock salt (NaCl), ice, and water mixture is used to cool milk and cream to make homemade ice cream. How many grams of rock salt must be added to water to lower the freezing point 12.6°C?
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04/24/24

What is the molarity of each resulting solution when the following mixtures are prepared?
(a) 587.7 mL H2O is added to 20.0 mL 6.25 M HNO3 (b) 31.7 mL 1.75 M HCl is added to 80.0 mL 0.336 M HCl
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04/24/24

What is the value of K for this aqueous reaction at 298 K

A + B ⇌ C + D Delta G Deegree = 23.53 kJ/mol
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04/24/24

Given the information calculate ΔG° at 298 K for the reaction A + B --> 2C
A + B --> 2D. Delta H deegree= -666.3 kJ Delta S deegree= 301.0 J/K C--> D Delta H deegree= 509.0 kJ Delta S deegree= -163.0 J/K
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04/23/24

What is the molarity of the following solutions?
(a)4.3 mol KCl in 1.0 L of solution (b) 1.92 mol H2SO4 in 348 mL of solution (c) 0.891 mol of ammonia in 225 mL of solution 
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04/23/24

The label on a 2.0e+02 mL stock bottle reads "20.5% alcohol by volume."
What volume of alcohol does it contain?
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04/23/24

The solubility of a gas in water is 0.11 g/L at 24.2kPa of pressure.
What is the solubility when the pressure is increased to 115kPa?
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04/23/24

What percent by volume of 27 mL if methanol in 65 mL if water?
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04/22/24

For the galvanic (voltaic) cell Fe(s) + Mn²⁺(aq) ⟶ Fe²⁺(aq) + Mn(s) (E° = 0.77 V at 25 °C), what is [Fe²⁺] if [Mn²⁺] = 0.035 M and E = 0.78 V? Assume T is 298 K
For the galvanic (voltaic) cell Fe(s) + Mn²⁺(aq) ⟶ Fe²⁺(aq) + Mn(s) (E° = 0.77 V at 25 °C), what is [Fe²⁺] if [Mn²⁺] = 0.035 M and E = 0.78 V? Assume T is 298 K
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04/22/24

What is the theoretical yield of H2SiF6? What is the percent yield?

Hydrofluoric acid solutions cannot be stored in glass containers because HF reacts readily with silica dioxide in glass to produce hexafluorosilicic acid (H2SiF6).SiO2(s) + 6 HF(aq)  H2SiF6(aq) + 2... more
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04/21/24

In what report should the solutions of the salt 55% and 20% be mixed to obtain a 40% salt solution.
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04/20/24

Given the equation: CH4 (g) + 2 O2 (g) ⇋ CO2 (g) + 2 H2O (g) What direction will the reaction shift when more H2O (g) is removed?
Given the equation:CH4 (g) + 2 O2 (g) ⇋ CO2 (g) + 2 H2O  (g)What direction will the reaction shift when more H2O  (g) is removed?
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04/19/24

What quantity in moles of NaOH need to be added to 200.0 mL of a 0.200 M solution of HF to make a buffer with a pH of 4.00? (Ka for HF is 6.8 × 10⁻⁴)
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04/18/24

finding frequency in chemistry problem
A local FM radio station broadcasts at an energy of 6.12 * 10^-29 kJ/photon. (1 MHz=10^6 s^-1) Calculate the frequency at which it is broadcasting. Frequency = _____MHz
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04/18/24

Calculate the equilibrium constant at 298.15 K for the reaction.
Oxaloacetate2−(aq)+NADH(aq)+H+(aq)malate2−(aq)+NAD+(aq)The standard potential has been calculated at .164 VCalculate the equilibrium constant at 298.15 K for the reaction.
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