Question

What will the presence of H+ ions in a solution cause?

a bitter taste when consumed

a reaction with magnesium to release hydrogen gas

a slippery feeling

a reaction with an acid

Answer 1

a reaction with magnesium to release hydrogen gas

Answer 2

Uh, no. Reacting magnesium with hydrogen gas would form magnesium hydride.

Answer 3

@abbot please read carefully the problem
The question is asking about H+ ions NOT hydrogen gas (H2).
Usually H+ refer to acidic solution HCl (aq)
https://www.youtube.com/watch?v=doZ9G9R3yfg