Trung hòa 200ml dung dịch H2SO4 1M bằng dung dịch NaOH 20%. Khối lượng dung dịch NaOH cần dùng là:

2 câu trả lời

Đáp án:80gam nha bn

Bước 1: Tính số số mol: nH2SO4 = VH2SO4 . CM H2SO4

Bước 2: Tính số mol NaOH => m NaOH

Bước 3: Tính  m ddNaOH dựa vào công thức mdd NaOH = mNaOH : C

Giải thích các bước giải:

 

Đáp án:

 80g

Giải thích các bước giải:

 

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