Asolution is made by mixing 50 ml of 2.0m k2hpo4 and 25 ml of 2.0m kh2po4. the solution is diluted to a final volume of 200 ml. what is the ph of the final solution

50 mL of 2.0 M of and 25 mL of 2.0 M of were mixed to make a solution

Final volume of the solution after dilution = 200 mL    (given)

Final concentration of , [] =

Final concentration of , [] =

Using Hasselbach- Henderson equation:

Substituting the values:

Hence,  the of the final solution is 7.15.

nacl is added to the aqueous of what? ? in order to get a proper answer you have to specify the exact composition of the aqueous solution.

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !