# gen chem

posted by .

if the voltage of the cell is 2.0898V at 25C when [Mg2+] = 0.1945M and the pressure of H2 = 1.00atm, what is the pH? E0=2.3700V

Mg(s)+2H+(aq)<--> Mg2+(aq)+ H2(g)

• gen chem -

Ecell = Eocell -(0.0592/2)*log Q.

Substitute the values from the problem and solve for H^+ (a part of Q). Convert to pH.

## Similar Questions

1. ### Chem

Whis is the relationship between DG and DGf° for the reaction MgF2(s) ===> Mg2+(aq) + 2 F-(aq) Is it: DG = {DGf°[Mg2+(aq)] + 2 DGf°[F-(aq)] - DGf°[MgF2(s)]} + RT ln([Mg2+][F-]2) or DG = {DGf°[Mg2+(aq)] + 2 DGf°[F-(aq)] + RT …
2. ### chem

Use Henry's law and the solubilities given below to calculate the total volume of nitrogen and oxygen gas that should bubble out of 1.2L of water upon warming from 25C to 50C . Assume that the water is initially saturated with nitrogen …
3. ### Chemistry

Sally is goint to determine the quantity of MgSO4 by titrating the Mg2+ ions using EDTA. What is the concentration of Mg2+ (in mmol/L) in the sample if it takes 22.9 mL of EDTA solution with concentration of 0.01108 mol/L to titrate …
4. ### Chemistry

Calculate E, E^o and (delta)G^o for the following cell reaction: Mg(s) + Sn2+(aq) (yields) Mg2+(aq) + Sn(s) [Mg2+] = 0.045 M, [Sn2+] = 0.035 M
5. ### chemistry

why is this reaction spontaneous? Mg + 2Cu2+ --> Mg2+ + 2Cu+ Mg2+ + 2e --> Mg E= -2.37 V Cu2 + e --> Cu+ E= 0.15 V
6. ### chemistry

E degrees (V) A galvanic cell based on the following half reaction s Au3+ 3e- ----> Au 1.50 Mg2+ 2e- ------> Mg -2.37 The cell is set up at 25 C with [Mg2+] = 1.00 x 10^-5 M The cell potential is observed to be 4.01 V. Calculate …
7. ### chem

combination reaction. mg2+o2
8. ### Easy Chemistry

What is the oxidation half-reaction for Mg(s) + ZnCl2(aq) MgCl2(aq) + Zn(s)?
9. ### Chem

Consider the following cell: Pt|H2(g,1atm)|H+(aq,?
10. ### college chemistry

The equilibrium constant for the reaction Sr(s) + Mg2+(aq) <---> Sr2+(aq) +Mg(s) is 3.69 x 10^17 at 25 C. Calculate Ecell for a cell made up of Sr/Sr2+ and Mg/Mg2+ half cells.

More Similar Questions