Question

At 25 °C, CaCrO4 (s) < ------- > Ca2+ (aq) + CrO42- (aq) has an equilibrium...

At 25 °C, CaCrO4 (s) < ------- > Ca2+ (aq) + CrO42- (aq) has an equilibrium constant Kc = 7.1 x 10-4. What are the equilibrium concentrations of Ca2+ and CrO42- in a saturated solution of CaCrO4?

Science   Chemistry   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

equilibrium constant Kc = 7.1 x 10^-4.

CaCrO4 (s) < ------- > Ca2+ (aq) + CrO42- (aq)

                                     S                  S

Kc = [Ca+2][CrO42-]

7.1 x 10^-4 = S^2

S = 0.0266 M

equilibrium concentrations of Ca2+ and CrO42- = 0.0266 M

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
Consider the reaction CaSO4(s)⇌Ca2+(aq)+SO2−4(aq) At 25 ∘C the equilibrium constant is Kc=2.4×10−5 for this reaction. If...
Consider the reaction CaSO4(s)⇌Ca2+(aq)+SO2−4(aq) At 25 ∘C the equilibrium constant is Kc=2.4×10−5 for this reaction. If the resulting solution has a volume of 1.1 L , what is the minimum mass of CaSO4(s) needed to achieve equilibrium? Express your answer to two significant figures and include the appropriate units.
Given the following equilibrium systems: CaF2(s) <----> Ca2+(aq) + 2F-(aq); Kf = 4.0 x 10-11 HF(aq)...
Given the following equilibrium systems: CaF2(s) <----> Ca2+(aq) + 2F-(aq); Kf = 4.0 x 10-11 HF(aq) <----> H+(aq) + F-(aq); Ka = 7.2 x 10-4 Determine the molar solubilty of CaF2 in 0.20 M HF solution.
Write the equilibrium‑constant expression for the reaction A(s)+3B(l)↽−−⇀2C(aq)+D(aq)A(s)+3B(l)↽−−⇀2C(aq)+D(aq) in terms of [A],[A], [B],[B], [C],[C], and [D],[D],...
Write the equilibrium‑constant expression for the reaction A(s)+3B(l)↽−−⇀2C(aq)+D(aq)A(s)+3B(l)↽−−⇀2C(aq)+D(aq) in terms of [A],[A], [B],[B], [C],[C], and [D],[D], as needed. Note that ?c,Kc, which is sometimes symbolized as ?eq,Keq, denotes that the equilibrium constant is expressed using molar concentrations. For this question, ?cKc means the same thing as ?eq.
Equilibrium constants at 25 ∘C are listed in the table below. Substance Kc Value of Kc...
Equilibrium constants at 25 ∘C are listed in the table below. Substance Kc Value of Kc CaCO3 Ksp 4.5×10−9 H2CO3 Ka1 4.3×10−7 Ka2 5.6×10−11 What is the molar solubility of marble (i.e., [Ca2+] in a saturated solution) in normal rainwater, for which pH=4.20?
1) What is the pH of a 0.100 M NH4Cl(aq) solution? 2) The reaction A(aq) +...
1) What is the pH of a 0.100 M NH4Cl(aq) solution? 2) The reaction A(aq) + B(aq) → 2C(aq) has an equilibrium constant of Kc= 5.2. If the initial concentrations are [A] = 0.100 M, [B] = 0.000 M, and [C] = 0.500 M, what are the concentrations of A, B, and C at equilibrium? 3) What are the concentrations of H3O+, H3PO4, H2PO4-, and HPO42- in a 0.100 M H3PO4(aq) solution? (In this solution, 0.100 M would be the...
Calculate the value of the equilibrium constant, Kc, for the following reaction. FeS(s) + 6CN-(aq) <----->...
Calculate the value of the equilibrium constant, Kc, for the following reaction. FeS(s) + 6CN-(aq) <-----> [Fe(CN)6]4-(aq) + S2-(aq) Kc=______? The solubility product constant, Ksp, for FeS is 1.6 × 10^–19, and the formation constant, Kf, for [Fe(CN)6]^4– is 1.5 × 10^35 Kc=______
Write the equilibrium expression (Kc) for the following reacCon. PbCl2(s) ? Pb2+(aq) + 2Cl–(aq) Kc =...
Write the equilibrium expression (Kc) for the following reacCon. PbCl2(s) ? Pb2+(aq) + 2Cl–(aq) Kc = ______________________ b. (6 pts) At 25˚C, a certain mass of PbCl2 was dissolved in water and the equilibrium concentraCon of dissolved Pb2+ was measured to be 1.62 x 10–2 M. Calculate Kc for this process. (Hint: If 1 mole of Pb2+ dissolves, how much Cl– dissolves with it?) c. (4 pts) In ques@on 2b, the mass of solid PbCl2 added to water was not...
1. Calculate the equilibrium constant Keq for the following reaction at 25°C: 3Fe2+(aq) + 2Cr(s) ↔...
1. Calculate the equilibrium constant Keq for the following reaction at 25°C: 3Fe2+(aq) + 2Cr(s) ↔ 3Fe(s) + 2Cr3+(aq) 3.8 x 10–31 7.2 x 10–11 1.4 x 1010 2.6 x 1030 1.6 x 1015 2. A 1M aqueous solution of copper(II) nitrate is electrolyzed. What are the predicted products at the anode and cathode? N2 gas at the anode; copper metal at the cathode O2 gas at the anode; copper metal at the cathode NO2 gas at the anode; copper...
Part A Calculate the equilibrium constant at 25 ∘C for the reaction Fe(s)+2Ag+(aq)→Fe2+(aq)+2Ag(s) Standard Reduction Potentials...
Part A Calculate the equilibrium constant at 25 ∘C for the reaction Fe(s)+2Ag+(aq)→Fe2+(aq)+2Ag(s) Standard Reduction Potentials at 25 ∘C Fe2+(aq)+2e−→Fe(s) E∘= −0.45 V Ag+(aq)+e−→Ag(s) E∘= 0.80 V
Balance the following reaction assuming acidic solution: Fe(OH)2(s) + CrO42-(aq) --> Fe2O3(s) + Cr(OH)4-(aq) balance the...
Balance the following reaction assuming acidic solution: Fe(OH)2(s) + CrO42-(aq) --> Fe2O3(s) + Cr(OH)4-(aq) balance the reaction with the smallest whole number coefficient.
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT