![madgiemiller2309](/avatars/12954.jpg)
madgiemiller2309
16.07.2019 •
Chemistry
Enough of a monoprotic acid is dissolved in water to produce a 0.0165 m solution. the ph of the resulting solution is 2.68. calculate the ka for the acid.
Solved
Show answers
More tips
- C Computers and Internet The Twitter Phenomenon: What it is and How to Use it...
- C Computers and Internet How to Choose a Laptop: Expert Guide and Tips...
- C Computers and Internet How to Choose a Monitor?...
- H Horoscopes, Magic, Divination Where Did Tarot Cards Come From?...
- S Style and Beauty How to Make Your Lips Fuller? Ideas and Tips for Beautiful Lips...
- C Computers and Internet How to Learn to Type Fast?...
- A Art and Culture Who Said The Less We Love a Woman, the More She Likes Us ?...
- F Family and Home How to Get Rid of Your Neighbors?...
- S Society and Politics How Could Nobody Know About the Dead Mountaineers?...
Ответ:
Chemical reaction: HA(aq) ⇄ A⁻(aq) + H⁺(aq).
c(monoprotic acid) = 0.0165 M.
pH = 2.68.
[A⁻] = [H⁺] = 10∧(-2.68).
[A⁻] = [H⁺] = 0.00209 M; equilibrium concentration.
[HA] = 0.0165 M - 0.00209 M.
[HA] = 0.0144 M.
Ka = [A⁻]·[H⁺] / [HA].
Ka = (0.00209 M)² / 0.0144 M.
Ka = 0.000303 M = 3.03·10⁻⁴ M.
Ответ:
In First compound the longest chain contains 7 C atoms.
In the Second compound the longest chain contains 9 C atoms.
In the Third compound the longest chin contains 7C atoms.
Explanation: