4/16/2018 Chem 106 . Predict whether the following solutions are neutral, acidic

Question

4/16/2018 Chem 106 . Predict whether the following solutions are neutral, acidic or basic a. KBr b. CH COONa (sodium acetate) e. FeCl d. NHiNO e. Na CO 6. Calculate the pH before and after adding 0.05 mol of NaOH to (I) 1.00 L H:0,(2) 1.00 L buffer made from 0.25 M HF (K. 7.2x 10-+) and 0.35 M NaF, and (3) 1.00 L buffer made from 0.50 M HF (K.-7.2x 10-) and 0.70 M NaF. Show vour work! pH 1.00-L H O 1.00-L Buffer 1.00-L Buffer (0.45 M HF/0.50 M NaF) (0.90 M HF/1.00 M NaF) Before adding 0.05 mol OH After adding 0.05 mol OH pH change

Explanation / Answer

I am solving the complete Q1 with all sub-parts as per Chegg guidelines, post multiple question to get the remaining answers

Q1)

a) KBr

KBr is salt of strong base (KOH) and strong acid (HBr), hence it will be neutral

b) CH3COONa

CH3COONa is salt of strong base (NaOH) and weak acid (CH3COOH), hence it will be basic

c) FeCl3

FeCl3 is a salt of weak base (Fe(OH)3) and strong acid (HCl), hence it will be acidic

d) NH4NO3

Salt of weak base (NH4OH) and strong acid (HNO3), hence it will be acidic

e) Na2CO3

Salt of strong base (NaOH) and weak acid (H2CO3), hence it will be basic

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