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0.1 g ()

( Na = 23 , O = 16 , H = 1 ) ، 0.1 mol /L 10 ml

.

‫ﺍﻟﺤــﻞ‬

NaOH + HCl NaCl + H2O

Ma Va = Mb Vb

na nb

0.1 x 0.01 1

=
1

0.001 mol = NaOH 

40 g/mol = 1 + 16 + 23 = NaOH 

0.04 g = 40 × 0.001 = × = NaOH

40 % = 100 × 0.04 = NaOH
0.1

10 ml 40 ml 0.1 L ()

(Na = 23 , C = 12 , O = 16) ، 0.1 M

‫ﺍﻟﺤــﻞ‬

Na2CO3 + H2SO4 Na2SO4 + H2O + CO2

Ma Va = Mb Vb

na nb

0.1 x 10 = Mb x 40

11

0.025 mol / L = ( ) Mb

106 g/mol = ( 3 X 16 ) + 12 + ( 2 X 23 ) = Na2CO3

XX = g

0.265 g = 106 X 0.1 X 0.025 =

١٠٠ 

101