Consider a concentration cell. Two Ag-electrodes are immersed in AgNO3 solutions of different concentrations. When the two compartments have an AgNO3-concentration of 1 M and 0.1 M, respectively, the measured voltage is 0.065 V (note: T in not necessarily = 25°C !).

a. What is the voltage, if the two compartments have AgNO3-concentration of 1 M and 0.01 M, respectively?

The electrochemical behavior of silver nanoclusters (Agn, with n the number of Ag atoms in the cluster) is investigated using the following electrochemical cells at 298 K:
I. Ag(s) | AgCl (saturated) || Ag+(aq, 0.01M) | Ag(s), E=0.170
II. (Pt electrode) Agn (s, nanocluster) | Ag+(aq, 0.01M) || AgCl (saturated) | Ag(s), with E = +1.030 V for Ag5 nanocluster and E = +0.430 V for Ag10 nanocluster

The standard reduction potential for Ag+ + e- → Ag, is E0 = +0.800 V.

b. Use this data to calculate the solubility product of AgCl.

The two nanoclusters Ag5 and Ag10-nanoclusters have standard potentials different from the potential of metallic bulk silver.

c. Calculate the standard potentials of Ag5 and of Ag10 nanoclusters. [for this part use Ksp(AgCl)=1.800·10-5; this is not the same value as calculated in b.]

d. What happens, if you put the Ag10 nanoclusters and – in a second experiment – the Ag5 nanoclusters into an aqueous solution of pH=5? Estimate the consequences using the reduction potentials you calculated.

Carbon disulfide is prepared by heating sulfur and charcoal. The chemical equation is

S2(g)+C(s)−⇀↽−CS2(g)Kc=9.40 at 900 KS2(g)+C(s)↽−−⇀CS2(g)Kc=9.40 at 900 K

How many grams of CS2(g)CS2(g) can be prepared by heating 16.5 mol S2(g)16.5 mol S2(g) with excess carbon in a 9.40 L9.40 L reaction vessel held at 900 K until equilibrium is attained?

mass of CS2(g)CS2(g):

Into a 67.2L container containing O₂ (g) at STP is added 32.0g CH₄(g); the container is sealed and the mixture is combused. Assuming that all reactants and products remain as gases, waht will be the final pressure of the container and the partial pressures of each gas after the flask cools to 100^oC?

Carbon dioxide dissociates to form carbon monoxide.

a. Write down the balanced stoichiometric equation representing the complete dissociation of CO2 to CO

b. determine the equilibrium constant for this reaction at 2000 K

c. Write down the balanced stoichiometric equation when 25% of CO2 has disassociated into CO

d. What is the value of the equilibrium constant when this occurs i.e., when 25% of CO2 has disassociated into CO at 1 bar?

e. At what temperature (approximately) does this occur

f. explain if the complete dissociation of CO2 to CO is an endothermic or exothermic reaction.

g. Finally, determine the enthalpy of this reaction at standard conditions to verify if the complete dissociation of CO2 to CO is endothermic or exothermic

State two major differences between sequential reactions and double-displacement multi-substrate reactions.

You are titrating 50 ml. of nitrous acid with sodium hydroxide (0.15 M). Equivalence is reached at 22.0 ml of NaOH delivered. Calculate the pH of the solution in the flask: - before the beginning of the titration - after the delivery of 5 ml. of titrant - at half$equivalence - at equivalence -after delivery of 23 ml. of titrant. -------------Give detail Show ALL WORK, UNITS and use ICE/reaction table and ML (no millimoles). Please be clear in how you get numbers for everything like the reaction table... I've asked this before and have gotten incomplete answers.

1. Electrolytic reactions, like other chemical reactions, are not 100% efficient. In a copper purification apparatus depositing Cu from a CuSO4 solution, operation for 5.47 hours at a constant current of 5.45 A deposits 29.2 g of Cu metal. What is the efficiency?

b) How long would it take to electroplate all the Zn²⁺ in 0.280 L of 0.210 M ZnSO₄ solution with a current of 2.35 A?

please answer both A and B

1. Please explain why “noncompetitive inhibition”- where it is observed experimentally- is more likely to be a coincidence than a reveal of something profound in the mechanism of an enzyme (in contrast to competitive and uncompetitive inhibition).

Please show all work!

Balance the following reaction in a basic solution:

Ag(s)+Zn^2+(aq)--->Ag2O(aq)+Zn(s)

Use the following half-reactions to write three spontaneous reactions, and calculate E cell for each reaction:

a. Au⁺ (aq) + e^- ----> Au (s) E= 1.69 V

b. N₂O (g) + 2H⁺ (aq) + 2 e^- ----> N₂ (g) + H2O (l) E= 1.77 V

c. Cr³⁺ (aq) + 3e^- ---> Cr (s) E= -0.74 V

What do you understand by " hydrated ions" ? Give examples of hydrated ions and explain at least one hydrated ion's sturcture and formation.

1.) For the chemical reaction 2 Al + 3 H 2 SO 4 ⟶ 3 H 2 + Al 2 ( SO 4 ) 3 what mass of hydrogen is produced from 1.97 mol of aluminum?

2.) Convert 1.77×1024 atoms of carbon to moles of carbon.

1.77×1024 atoms=

3.)

Consider the combustion reaction for octane (C8H18), which is a primary component of gasoline.

2C8H18+25O2⟶16CO2+18H2O

How many moles of CO2 are emitted into the atmosphere when 17.1 g C8H18 is burned?

4.) For the reaction

2KI+Pb(NO3)2⟶PbI2+2KNO3how many grams of lead(II) iodide, PbI₂, are produced from 89.7 g of potassium iodide, KI?

5.)For the reaction

2NaOH+H2SO4⟶Na2SO4+2H2O

how many grams of sulfuric acid, H₂SO₄, are needed to react completely with 33.1 g of sodium hydroxide, NaOH?

PLEASE HELP...

Calculate the value of deltaG for the reaction

Si3N4 + 3O2 = 3 SiO2(alpha-quartz) + 2 N2

at 800 K. What percentage error occurs if it is assumed that deltaCp for the

reaction is zero?