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  3. a 300ml buffer is prepared in which [hco3-] = 0.2m

A 300mL buffer is prepared in which [HCO3-] = 0.2M and [CO3^2-]=0.075M. a) What is the pH...

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Chemistry

A 300mL buffer is prepared in which [HCO3-] = 0.2M and[CO3^2-]=0.075M.

a) What is the pH of this buffer (Ka HCO3-=4.7x10^-11)?

b) What is the pH of the buffer if 0.0100 moles of HCl areadded?

c) What is the pH of the buffer if 0.0200 moles of NaOH areadded?

Answer & Explanation Solved by verified expert
3.6 Ratings (360 Votes)
a pH of buffer solution is calculated by using Hendersonsequation pH log Ka log Conjugate base acid pH log Ka logCO 3 2 HCO 3We have HCO 3 02 M CO 32 0075 M and Ka of HCO3 47 10 11Substituting these values in Hendersons    See Answer
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