# Chemistry!!

posted by .

Calculate the pH of 10.00 mL of 0.40 mol/L of hydrochloric acid.

• Chemistry!! -

pH = -log (H^+)
HCl ionizes 100% so it is 0.4M. Substitute into the pH equation and solve.

• Chemistry!! -

i did that, but the answer is wrong.

• Chemistry!! -

What did you get. SHOW YOUR WORK. That way I can find the error.
Your answer should have been 0.397 which I would round to 0.4 as a pH. By the way, the 10.00 mL has nothing to do with it (the concn is what counts) UNLESS the 10.00 mL was diluted to some final volume. But the problem does not say that.

• Chemistry!! -

oh ok! i wasn't rounding, thank you.

## Similar Questions

1. ### chem

If 0.752 g of pure sodium carbonate was dissolved in water and the solution titrated with 25.90 mL of hydrochloric acid to a methyl orange end point, calculate the molarity of the hydrochloric acid solution. (Hint: This process takes …
2. ### Chemistry

Can you check if this is correct please? a) How many moles of sodium hydroxide are there in 19.00 cm3 of 0.100 mol dm3?
3. ### Chemistry

If 1 mol L of 2.0 mol L hydrochloric acid is diluted to form a solution with concentration 0.2 mol L, A. What is the final volume?
4. ### chemistry

in the reaction of magnesium metal with hydrochloric acid to produce magnesium chloride and hydrogen gas. If 4.59 mol of magnesium and 4.59 mol of hydrochloric acid are reacted, how many moles of magnesium chloride are produced ?
5. ### chemistry

Solution A:50cm^3 of 1.0mol dm^-3 hydrochloric acid,HCl Solution B:10cm^3 of 2.0mol dm^-3 hydrochloric acid,HCl (a)Calculate the number of moles of hydrochloric acid,HCL in each solution. (b)Solution A and B are mixed together. (i)Calculate …
6. ### Chemistry

14.6 mL of hydrochloric acid is completely neutralized by 25.0 mL of 1.40 M sodium hydroxide, what was the hydrochloric acid mass percent (m/m) before the titration?
7. ### chem

A sewage cleanser contains concentrated hydrochloric acid (HCl) as the active ingredient. A titration experiment was carried out to determine the concentration of hydrochloric acid in the domestic cleanser. 25.0 mL of the cleanser …
8. ### chemistry

A common way of producing hydrogen gas in the lab is by reacting zinc with hydrochloric acid. Zn (s) + 2 HCl (aq) -> ZnCl2 (aq) + H2 (g) A sample of impure zinc, of mass 5.10g, reacted with an excess of hydrochloric acid solution …
9. ### Chemistry

a domestic cleaner contains concentrated hydrochloric acid as the active ingredient. a titration experiment was carried out to determine the concentration of hydrochloric acid in the domestic cleanser. 20.0mL of the cleanser were diluted …
10. ### chemistry

calculate the volume of 4.0 M hydrochloric acid needed to make 100.0 mL of 0.10 M hydrochloric acid.

More Similar Questions