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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: Tomf on January 14, 2021, 05:41:21 AM

Title: How do I quickly figure out which will form a buffer?
Post by: Tomf on January 14, 2021, 05:41:21 AM

for example I had a question where all the pairs have the same Molar ratio, and it asks me which pairs will form a buffer. How would I go about solving this. I don't need the solution, just a method for doing this please.

a.CH3COOH + CH3COONa
b.NH4Cl + NH3
c.HCl + NaCl
d.HCl + CH3COOH
e.NaOH + HCl
f.NaOH + CH3COO

Title: Re: How do I quickly figure out which will form a buffer?
Post by: AWK on January 14, 2021, 05:49:56 AM

Do you know the definition of a buffer solution?

Title: Re: How do I quickly figure out which will form a buffer?
Post by: Tomf on January 14, 2021, 05:57:42 AM

Yes, it's a weak acid with it's conjugate base. I don't know how to figure that out quickly without calculating the pH

Title: Re: How do I quickly figure out which will form a buffer?
Post by: Borek on January 14, 2021, 06:12:25 AM

Quote from: Tomf on January 14, 2021, 05:57:42 AM

Yes, it's a weak acid with it's conjugate base.

Can you decide - for given mixtures - whether they contain such pairs?

(some of the questions, as asked, are impossible to answer without further info, but let's start with the obvious ones)