Question

Help please

How many grams of hydrochloric acid would it take to neutralize 0 040 grams of sodium hydroxide? What is the pH of the sodium hydroxide solution What is the net ionic equation for the reaction What is the net ionic equation for the reaction What is the pH of a.0001M of magnesium hydroxide? What is the pOH? Given the concentration of the OH- ion in each solution, calculate the concentration of the H3O+ in that solution. Identify each solution as acidic, baste or neutral What is the pH of a solution whose hydronium ion concentration is 6 Times 10^-8 M.

Answer 1

7.

HCl + NaOH --> H2O + NaCL

Molecular weight [MW]

MW NaOH = 40 g/mol

MW HCl= 36.45 g/mol

The steqiometry is 1 mol of HCl for 1 mol of NaOH, therefore:

moles NaOH = 0.040 [g] /40 [g/mol] = 0.001 mol

So we need 0.001 mol of HCl,

0.001(HCl) mol * 36.45 [g/mol] = 0.0364 g. So we need 0.0364 g of HCl to neutralize 0.04 g of NaOH

For 7 a) we need more information, we need the total amount of solvent (volume) so we can have the molarity.

7B)

H⁺(aq) + Cl^-(aq) + Na⁺(aq) + OH^-(aq) --> H2O(l) + Na⁺ (aq) + Cl^-(aq)

We can only answer one question per exercise.