Dear BG [Chemistry]

[Zigma]

which is 0.1M solution has the highest concentration of h3O+ ions?

ch3cooh
NaC1
KBr
Ba(OH)2

for a friend-

[Remyo]

which is 0.1M solution has the highest concentration of h3O+ ions?

ch3cooh

[Slapper]

If I saw that on a test, I'd pick acetic acid (first one)

[MisterBob]

Dear BG: Where is google?

[Remyo]

Dear BG: Where is google?

i need to know

[Zigma]

i tried google but could not find it ;(

[Melchiah]

which is 0.1M solution has the highest concentration of h3O+ ions?

ch3cooh
NaC1
KBr
Ba(OH)2

for a friend-

ch3cooh <-- This is acetic acid

NaCl <-- This is an ionic salt, table salt

KBr <-- This is also an ionic salt

Ba(OH)2 <-- This is a -hydroxide, meaning it is a base

Long Answer: The pH of a solution is a measure of the concentration of the H3O+, or hydronium ion in the solution. Basic compounds (like hydroxides) increase the OH- concentration in the solution, whereas acids increase the concentration of H3O+ ions. Thus, you can eliminate any hydroxide compounds from your answer set. The two ionic salts will cause changes in pH, however they will not cause the magnitude of change that the weak acid (acetic acid) will. If there were more than one acidic compound in the answer set, one would need to try and determine whether one was looking at strong acids vs weak acids, and how much of a pH change would be effected by each acid. There is also the Henderson-Hasselbach equation to help determine pH. The lower the pH, the higher the acidity of the solution and thus the higher concentration of hydronium.

Short answer: In the answer set provided, choice (A) acetic acid; CH3COOH causes the greatest increase in H3)+ concentration.

EDIT: Clarification: Just having the -OH group at the end of a chemical compound's name does not exclusively mean it is a hydroxide. Hydroxides will always be denoted in parentheses when there are multiple hydroxides. In the case of Acetic Acid, the COOH is a polyatomic ion in and of itself, the OH part of that ion does not exist as it's own entity. The -COOH ion generally denotes an organic acid, whereas Dran-o, NaOH has the -OH ion.

[Remyo]

why is everyone continuing to give the answer I already gave, or is it just support.

[Melchiah]

You gave the man an answer. I gave the man the logic to determine the answer for the next pH problem he gets.

[Epical]

Give a man a fish...

[aznmajiktaru]

Let them eat cake

[Kaylia]

Give a man a fish...

and he will eat it? I'm hungry.


This thread made me realize how much I forgot about chemistry in 5 years. I would have answered it right, but it was more a guess than anything. Kinda tempted to pick an optional chemistry class instead of maths now.

[Mulligan]

God damnit, the one time I can put my degree to use giving advice on BG and im an hour late.... bg ive failed you.

[Tajin]

I want to live where 1hr = 24hrs/

[Mulligan]

ah fuck i read that as 8:23am. fail again