Other Chemistry Answers

DEAR SIR
IN DETERMINATION H2S IN CRUDE OIL WITH BORAX EXTRACTION THEN TITRATION WITH IODINE AND BACK TITRATE THIOSULPHATE,WHY I CHOOSE BORAX?WHY WE DONT CHOOSE ANOTHER BASE FOR EXAMPLE KOH OR NaOH?
BEST REGARDS

For the reaction:
2 NO (G) + O2 (G) 2 NO2 (G)





Write the equilibrium constant expression for the reaction.
What effect would an increase in temperature have on the reaction rate?
What would be the effect on the reaction rate if the [O2] were doubled?
What would be the effect on the reaction rate if the pressure on the reaction were doubled?
Assume the reaction is reversible and at equilibrium. What shifts in the equilibrium of this reaction are suggested by Le Chatelier's Principle?
IF AT EQUILIBRIUM THE
[NO2] = 0.400 M
[O2] = 0.875 M
AND THE KEQ OF THE EQUILIBRIUM IS .65



[NO] = ?

IF AT EQUILIBRIUM THE
[NO2] = 0.400 M
[O2] = 0.875 M
[NO] = 0.125 M



Keq = ?

What is the pH of a solution whose [H3O+] is 1 X 10 -6 M?
What is the pH of a solution whose [H3O+] concentration is 3.2 X 10-4 M?
What is the pH of a solution with a [H3O+] concentration of 1.5 X 10 -13 M?
Problem Set #2:

Find the pH of a solution whose [H3O+] is 6.5 X 10 -4 M.
Find the pH of a solution whose pOH is 5.36.
What is the pOH of a solution with a [OH -] concentration of 9.7 X 10 -11 M?
Calculate the pH of a solution with a [OH -] concentration of 2.3 X 10 -7 M.

1.How many moles of water does 6.02x1023 molecules represent?
2.Convert 3.01x1023 molecules of C2H6 to moles.
3. How many moles of glucose does 1.2x1024 formula units represent?
4. How many moles of CaCl2 does 2.41x1024 formula units represent?

1. How many atoms does 2.0 moles of He represent?
2. How many sodium ions are in 3.0 moles of NaCl?
3. How many molecules are in 0.25 moles of CH4?
4. How many total atoms are in 1.0 moles of H20?

Цhy add isoamylalcohol in determination of chloride in crude oil? IP-77 Test method.

Calculate the pH of a solution with a [OH -] concentration of 2.3 X 10 -7 M.

What is the pOH of a solution with a [OH -] concentration of 9.7 X 10 -11 M?

Find the pH of a solution whose pOH is 5.36

Find the pH of a solution whose [H3O+] is 6.5 X 10 -4 M.