Jawabanmu

2014-08-21T20:42:14+07:00
250 ml = 0,25 l =5/0,25 = 20 g/l
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2014-08-21T21:43:23+07:00
Dik :
g = 5 gram
V = 250 ml = 0.25 L
Mr NaOH (garam dapur) = 40 ( Ar Na = 23, O =16 , H = 1 ).
Dit : M ...?
Peny :
cari mol dulu :
n = 5/ 40
   = 0,125 mol
      
M = n/ V
     = 0,125 / 0,25
     = 0,5 mol L⁻¹

semoga membantu .


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