Question

AP chemistry question?? (Acid-Base Reactions)?
Which of the following solutions is the most basic?
a) 0.6M NH3
b) 0.150 M KOH
c) 0.100 M Ba(OH)2

Answer 1

i know the answer but i do not get it

i found it on this website

http://answers.yahoo.com/question/index?qid=20100811113444AAn6rsT

Answer 2

@oOKawaiiOo can u plz help me in this one?

Answer 3

Its C........ since there is 2 moles of -OH per molecule

Answer 4

wait i do not get it
how did u get that

do u need to do any calculations or something to all of them in order to find out which is the most basic

because tehy are all bases but what is the most basic

that is the part that i do not know

Answer 5

@oOKawaiiOo

Answer 6

Ummmm u can do some calculations.
0.100 M of Ba(OH)2 vs 0.150M KOH

1/10 of a liter of Ba(OH)2 has 0.2 moles of -OH
1.5/10 of a liter of KOH has 0.1 moles of -OH

If you add 3 Liters of each concentrations, in the Ba(OH)2, there will be 0.6 moles of -OH.
In KOH, there will be 0.45 moles of -OH. The more -OH in solution at the same volume, means more basic.

Answer 7

so what do u do for the nh3

Answer 8

@oOKawaiiOo

Answer 9

NH3 is a weak base...... As I learned it, ammonia is a weak base with pka value around 8-9

Answer 10

i got it NH3 is a weak electrolyte so it is not a strong base

Answer 11

yupppp.

Answer 12

ok then thanku :)

Answer 13

@oOKawaiiOo here

Answer 14

can u plz show me how u found the number of moles of OH in KOH ?

Answer 15

@oOKawaiiOo

Answer 16

if the concentration of the compound was .150 M of KOH
It means .150 moles of K and .150 moles of OH

Answer 17

oh ok then thanku