2020 100
1
Na
2O
2 1.560g
190.720g
1 Na2O
2H2O ________________
2 ____________________ 3
6 ____________________________________
1.560g Na2O2
3 ________________________
4 ______________________________
5 _______________
6 Na2O2 __________________
Na2O2
CaCO
3 ,6mol/L
7 ( ; )__________________
2
.(1)
X ___________ _____________________________
(2)
pH