Oblicz, ile moli wodorotlenku sodu potrzeba do przygotowania 200g roztworu o stężeniu 10%
Z def. stęż. procent.
10g NaOH------100g roztworu
xg NaOH--------200g roztworu
x = 20g NaOH
M NaOH=40g/mol
40g NaOH-----1mol
20g NaOH------xmoli
x = 0,5mola NaOH
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Z def. stęż. procent.
10g NaOH------100g roztworu
xg NaOH--------200g roztworu
x = 20g NaOH
M NaOH=40g/mol
40g NaOH-----1mol
20g NaOH------xmoli
x = 0,5mola NaOH