Milk of magnesia is often taken to reduce the discomfort associated with acid stomach or heartburn. the recommended dose is 1 teaspoon, which contains 4.00×10²mg of mg(oh)². what volume of an hcl solution with a ph of 1.4 can be neutralized by one dose of milk of magnesia?

Explanation:

The reaction equation will be as follows.

It is given that mass of magnesium hydroxide is 400 mg or 0.4 g (as 1 g = 1000 g). Molar mass of is 58.31 g/mol.

Therefore, calculate the number of moles of as follows.

             No. of moles =

                                   =

                                   = mol

                                   = 0.00685 mol

Now, moles of HCl = 2 × moles of

                               = 2 × 0.00685 mol

                               = 0.0137 mol

Concentration of HCl = = = 0.0398 M

Now, we will calculate the volume of HCl as follows.

       Volume of HCl =

                                 =

                                 = 0.344 L

or,                             = 344 ml     (as 1 L = 1000 ml)

Thus, we can conclude that 344 ml of an HCl solution with a pH of 1.4 can be neutralized by one dose of milk of magnesia.