Chemistry Forum

Sorry we dont discuss this kind of things.

First get concentration of HCl

Develop the redoxreaction iodate iodine and the consumed H+.

IO3- + 5 I- + 6 HCl => 3 I2 + 3 H2O + 6 Cl-


With the two first titration you get K2CO3 pH 8.2 and the mixture with KOH pH 4.5 , the difference is KOH

From that calculate mass of K.

Where did you get the ka value from? The value is wrong. Potassium nitrate is a salt made by nitric acid and potassium hydroxide. Both are strong chemicals, acid and base. Also pH should be near neutral. Ka of HNO3 = 20,89, pKa =-1,32 Normaly pH = 14 - 1/2 * (pkB - lg [c anion]) If the value is righ...

You are right the concentration is less as 2 M
But its 2 mol/l - 8 *10^(-9) mol/l = 1,999999992 mol/l ~ 2 mol/l
So its near the same.

Why do you think the concentration of SO4 2- is wrong. You have 2 M H2SO4 so the value is right.

E =E0 + 0,059V/ z * log c Pb 2+

c Pb 2+ = ksp(PbSO4) / c SO4 2-

cPb 2+ = 1,6 *10^-8 (mol/l)^2 / 2 mol/l = 8 *10^(-9) mol/l

E = -0,126 V+ 0,059/2 * log (8*10^(-9))
E = -0,126V -0,238 V
E = -0,36 V

Why not give yours first?

What is your result?

The calculation for oxygen is wrong, because the molecule also contain oxygen. The masses of CO2 and H2O correspond to C and H. Calculate the moles of it and do a ratio to unbroken numbers. The mass of silverchloride correspond to the mass of Chlorine. Do also mole ratio. If you have C, H and Cl sub...

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The Person who can read has the advantage. Solution see above.

3 Ca(NO3)2 * 4 H2O + P2O5 => Ca3(PO4)2 + 6 HNO3 + H2O

HNO3 decompose to

4 HNO3 => 4 NO2 + 2 H2O + O2

What is generally a condensation, hydrolysis and Addition in chemistry?

As I wrote check the solubility products of both.
With them you can calculate the lead concentration.

Of course. But Palladiumchloride is a salt. What Palladium source you have.

That is what I am already said. Why repeating?