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tson2816
2 năm trước
Để điều chế khí hiđro trong PTN, người ta cho bột Zn phản ứng với dung dịch axit. Trong cốc thủy tinh chứa dung dịch gồm 9,8 gam H2SO4 loãng và m gam HCl, thêm 10,4 gam bột Zn vào cốc, khuấy đều để phản ứng hoàn toàn thấy kim loại tan hết và thoát ra V lit khí H2 (đktc). Dung dịch sau phản ứng không làm quỳ tím đổi màu. a. Viết PTHH và tính giá trị V, m. b. Tính tổng khối lượng muối thu được sau phản ứng.
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