How many h ions can the acid H2SO4 donate per molecule?

Answer 1

it can donate a maximum of 2, but may only donate 1 due to the amount of dissociation that occurs. if the acid is added to water, the first hydrogen will be lost in the reaction:

H2PO4 <===> HPO4- + H+

The next reaction may or may not occur due to the dissociation of the first H+. if the first hydrogen has remained, then the second will not dissociate as the concentration of hydrogens is too high, and the backwards reaction may take place, where the negative, single hydrogen ion will accept the hydrogen as it is a conjugate base, creates the original reactant.

Answer 2

The molecular formula tells you this H2PO4:

2 Hydrogen atoms

1 Phosphorous atom

4 Oxygen atoms

= 7 atoms in total in one molecule of the dihydrogen phosphate anion

Answer 3

This depends on the concentration and to a smaller extend to temperature.

For normal dilute solutions of ethanoic acid it can be calculated by this formula:

[H+] = SQRT(1.8*10-5 * Ca) in which Ca is the ethanoic acid concentration and [H+] is the H ions concentration, both in mol/L.

Examples: pH = -log[H+] , so:

• pH = 2.4 when Ca = 1 mol/L

  and

• pH = 3.9 when Ca = 0.001 mol/L

Answer 4

1 H+ Ion.

H3PO4 ===> H(+) + H2PO4(- )

Answer 5

Acid donates on singular H ion. This is evidenced by there only being one molecule of H within the equation.

Answer 6

U can use RMM to solve this question

Answer 7

The acid H2SO4 can donate up to 2 H+ ions.