Question

1)Find Equivalent mass of HBr in a complete neutralization reaction.

2) Find the mass of 1.00 equivalent of Fe(OH) < there's a 3 outside the parentheses lower right corner; in a complete neutralization reaction.
3) Find the equivalent mass of HNO3 (3 goes to the bottom right corner of O)
4) Calculate the concentration of hydronium ions in a solution with a pH of 4.3

Answer 1

Equivalent mass is the molar mass divided by the number of H+ available for dissociation. for an acid or number of moles of OH in the formula for a base. So it is = molar mass of HBr
So theEq mass of Fe(OH)3 = molar mass of Fe(OH)3/3
Can you do the other 2?