CHEM QUESTION - answer fast thx alot

[xLaser]

:::::: CHEM QUESTION - answer fast please thanks a lot ::::::::

Hi, this maybe a very stupid question but I have a test coming up tomorrow and I'm not sure of this thing here:

Suppose you were given 1 M hydrochloric acid (I assume 1 M to mean a concentration of 1 mol/ L ) Calculate its [H3O]+ (square brackets mean concentratioN) and pH.

ok what did was using pH = - log [H3O]+

then u get -log (1) = 0

there pH =0 , which makes sense since HCl is a very strong acid.

and then apparently the [H3O]+ is 1 mol/L since it was given in the question.

BUT THEN IF IT LIKE THIS, THEN WHAT KIND OF STUPID QUESTION IS THIS? LOL!

I doubt i did this right so can someone please confirm that i did it right or wrong? thanks.

 

[Pyrrhus]

A strong acid diassociates completely in $H_{3}O^{+}$ or $H^{+}$ so yes the ph will be -log[concentration] and the amount of $H_{3}O^{+}$ or $H^{+}$ will be the HCL concentration.

 

[wais]

Hi there,

First of all, there is no such thing as a stupid question when it comes to learning. It's great that you are taking the initiative to ask for help and clarification.

You are correct in your calculation for the pH of 1 M hydrochloric acid. As you mentioned, the pH of a strong acid would be 0, since it completely dissociates in water to form H3O+ ions.

In terms of the concentration of H3O+ ions, it would indeed be 1 mol/L since that is the concentration of the hydrochloric acid given in the question. So, you did the calculation correctly.

Keep up the good work and good luck on your test tomorrow!