Homework Help: Chemistry

Posted by Chemgam on Friday, January 11, 2013 at 1:35am.

(a) What is the pH of 50 mL of a 0.2M glycolic acid aqueous solution after adding 5 mL of 0.25 M KOH? The pKa of glycolic acis is 3.83 at 25 Celsius.

(b) Classify each of the following compounds as either "acidic", "basic", or "amphoteric" (able to act as either an acid or a base).

i)K2O =

ii) Al(OH)3 =

iii) Si(OH)4 =

iv) CaO =

Chemistry - Anonymous, Friday, January 11, 2013 at 3:57am
K2O - basic
Al(OH)3 - amphoteric
Si(OH)4 - acidic
CaO - basic
Chemistry - Anonymous, Friday, January 11, 2013 at 3:58am
K2O - basic
Al(OH)3 - amphoteric
Si(OH)4 - acidic
CaO - basic
Chemistry - lena, Friday, January 11, 2013 at 7:02am
what about a?
Chemistry - Anonymous, Friday, January 11, 2013 at 8:10am
a) 2.9844
Chemistry - Odesa, Friday, January 11, 2013 at 8:22am
a) 2.9844
b)K2O = basic
Al(OH)3 = amphoteric
Si(OH)4 = acidic
CaO = basic

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