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brensensky
2 năm trước
Để trung hòa 400 ml H2 SO4 2M bằng dung dịch natri hiđroxit 20% . a)ết phương trình phản ứng xảy ra. b) Tính khối lượng dung dịch NaOH cần dùng. c) Nếu thay dung dịch NaOH bằng dung dịch Ca(OH)2 thì phải dùng bao nhiêu gam dung dịch Ca(OH)2 là 7,4% để trung hòa oxit đã pha
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