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VCE Stuff => VCE Science => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Chemistry => Topic started by: naved_s9994 on July 19, 2009, 10:51:22 pm

Title: pH #2
Post by: naved_s9994 on July 19, 2009, 10:51:22 pm: what does pH tell the extent of hydolysis of hydrochloric acid..
is hydrochloric acid, a strong or weak acid?
Title: Re: pH #2
Post by: TrueTears on July 19, 2009, 10:52:50 pm: It's strong, so it'd have a low pH...
Title: Re: pH #2
Post by: lacoste on July 19, 2009, 10:54:39 pm: HCl is strong acid, CH3COOH is a weak acid.

You know that and you'll be fine for unit 2 if not then also unit 3.
Title: Re: pH #2
Post by: naved_s9994 on July 19, 2009, 11:01:43 pm: thanks!
Title: Re: pH #2
Post by: Gloamglozer on July 20, 2009, 02:20:55 pm: Quote from: lacoste on July 19, 2009, 10:54:39 pm
HCl is strong acid, CH3COOH is a weak acid.

You know that and you'll be fine for unit 2 if not then also unit 3.

In Unit 2 and 3, all you need to know is that $HCl$ , $HNO_3$ and $H_2SO_4$ are all strong acids.

All other acids are considered "weak" unless otherwise stated or given to you by the backwards arrow.

It's only in Unit 4 where you learn about $K_a$ where you can differentiate what is actually "strong" and "weak".