Chemistry Forum

Water (pH neutral) works like acid and neutralize a metal oxid to Hydroxide what gives alkaline solution.

And nonmetal oxide with water gives acid , because in this case water is a base.

No your answer is correct Ratio is 1 K2Cr2O7 to 6 Na2C2O4 We have 50 ml 0.3 M Na2C2O4 what is 15 mmol So we need 1/6 of 15 mmol = 2,5 mmol K2Cr2O7 The molarity is 0,2 M so we need 2,5mmol/0,2 mmol/ml = 12,5 ml Your question we have 6×0.2M× V1=2×0.3M × 50 ml Where does the 2 comes from, it is the sam...

Thiosulfat will be go to sulfate S2O3 2- + 10 OH- => 2 SO4 2- + 5 H2O + 8 e- Ozon will be to normal oxygen O3 + H2O + 2 e- => O2 + 2 OH- Second equation multiply by 4 4 O3 + 4 H2O + 8 e- => 4 O2 + 8 OH- Addition S2O3 2- + 10 OH- +4 O3 + 4 H2O + 8 e- => 2 SO4 2- + 5 H2O + 8 e- + 4 O2 + 8 OH- Simplef...

I dont know for what the citrate is for.

The reaction is Y(NO3)3 + 3 NaOH => Y(OH)3 + 3 NaNO3

Correct answers

What do you mean with Oxidation temperature. Boron is already oxidised
to B 3+ .

What did you add to get it?

Show your calculations.

Develop the redox equation. Then you can see the ratio of the moles easily.

Hint acidic medium means, if oxygen will be transferred.

Oxidation add H2O and get H+
Reduction add H+ and get H2O

Oxalate will get CO2

If you don't wright charges then put all atoms together.

C18H27Cl2N3O4

It's a neutralisation like NH3 + HCl => NH4+ + Cl-
A nitrogen in the chloroquine attract one H+ so the molecule will be posiv charged.

If you use diluted Perchloracid then you get C18H26ClN3 + HClO4 → ClO4- + C18H27ClN3+.

But if you use concentrated one, then producte CO2, H2O, HCl, N2 and crack compounds.

If this is the calculation, then

0.005 * 1000 = 5 not 0.5 isn't it.

The result would be 5, answer B

I think with the given equations you can develop by yourself. Add both equations so that the electrons will be erased,.

Please dont write products if you don't know what is going on.

Thiosulfat will be go to sulfate

S2O3 2- + 10 OH- => 2 SO4 2- + 5 H2O + 8 e-

Ozon will be to normal oxygen

O3 + H2O + 2 e- => O2 + 2 OH-