3. Cr** is acidic by virtue of the following hydrolysis reaction: Cr3+ + H2O + Cr(OH)2+...
Cr3+ (and other metal ions with a charge ≥ 2) is acidic by virtue of the hydrolysis reaction. Cr3+ + H2O equilibrium reaction arrow Cr(OH)2+ + H+ Ka1 = 10−3.66 [Further reactions produce Cr(OH)2+, Cr(OH)3, and Cr(OH)4−.] a) Considering only the Ka1 reaction, find the pH of 0.019 M Cr(ClO4)3. b) What fraction of chromium is in the form Cr(OH)2+?
Question 22 (4 points) Cr2O72- + 3 H2O2 + 8 H+ + 2 Cr3+ + 3 O2 + 7 H2O In the above reaction Ocrin Cr₂O7 2- is reduced. OH in H+ is oxidized. Cr₂O7 2 is the oxidizing agent and H2O2 is the reducing agent. Cr₂O7 2- is the reducing agent and H2O2 is the oxidizing agent.
Consider the following reaction at 298 K. 3 Cr3(a) Cr(s)>3 Cr(aq) Cr (aq) Which of the following statements are correct? Choose all that apply. E cell0 The reaction is reactant-favored. n 3 mol electrons Odelta Go0 Consider the following reaction at 298K. 2 Cr3+ (a Zn (s2 Cr2* (aq)+ Zn2* (aq) Which of the following statements are correct? Choose all that apply O K<1 cell 0 Odelta Go0 OThe reaction is product-favored On-5 mol electrons
1) Balance the following reaction under acidic conditions and calculate the cell potential in (V) at 298 K generated by the cell. Report your answer to the hundredths place. Cr2O72-(aq) + I-(aq) → Cr3+(aq) + I2(s) [Cr2O72-] = 2.0 M, [H+] = 1.0 M, [I-] = 1.0 M, [Cr3+] = 1.0 × 10-5 M 2) What is the value of n for the following reaction? Enter the whole number. 3Ni+(aq) + Cr(OH)3(s) + 5OH-(aq) → 3Ni(s) + CrO42-(aq) + 4H2O(l)
1. Which of the following reaction represents cathode reaction in chrom plating? a. Cr (s) → Cr6+ (aq) + 6 e¯ b. Cr (s) → Cr3+ (aq) + 3 e¯ c. Cr3+ (aq) + 3 e¯ → Cr (s) d. Cr (s) → Cr3+ (aq) + 6 e¯ 2. The molar solubility of AgBr is 6.3 × 10−7 M. What is its Ksp? 3. Co2+ (aq) + 6 H2O (l) ⇌ Co(H2O)62+ (aq) the ligand(s) is/are: a. Co2+ b. Co(H2O)62+...
Consider the following reaction at 298K. Cr3+ (aq) + 3 Cr2+ (aq) Cr (s) + 3 Cr3+ (aq) Which of the following statements are correct? Choose all that apply. The reaction is reactant-favored. Eocell > 0 K > 1 n = 2 mol electrons delta Go > 0
Write the rate law for the reaction.
Hydrolysis of PNA OH high pH +H2O HO NO2 NO2 -nitrophenylacetate (PNA) p-nitrophenol high pH p-nitrophenolate (PNP)
1) Calculate the OH- concentration at equilibrium in the following reaction: NH3 (aq) + H2O (l) -> NH4+ (aq) + OH- (aq) (Kb = 1.8 x10^(-5). (a) 1 x10^(-14) M (b) 2.7 x10^(-3) M (c) 7.2 x10^(-6) M (d) None of the above 2) Which of the following pH values indicates the most basic solution? (a) pH=12 (b) pH=4 (c) pH=8 (d) pH=9 3) Which of the following pH values indicate the most acidic solution? ( (a) pH=11 (b) pH=2...
Question 1 (4 points) Given the following balanced equation Cr, 0,2- + 3 H2O +8 H+ + 2 Cr3+ + 3 0, +7H,O What is the total number of electrons transferred in the balanced reaction? Please enter a number. What is the oxidation number of Cr in the dichromate ion? Please enter a number such as +2 or -2.
A voltaic cell utilizes the following reaction and operates at 298 K. 3 Ce4+(aq) + Cr(s) 3 Ce3+(aq) + Cr3+(aq) (a) What is the emf of this cell under standard conditions? _____V (b) What is the emf of this cell when [Ce4+] = 1.2 M, [Ce3+] = 0.010 M, and [Cr3+] = 0.012 M? ____V (c) What is the emf of the cell when [Ce4+] = 0.53 M, [Ce3+] = 0.89 M, and [Cr3+] = 1.0 M? ____V