[Học Để Thi] New comment on Bảo toàn mol electron.

Vua Hài Kịch has left a new comment on your post "Bảo toàn mol electron":

Bài 1: Hòa tan hoàn toàn 12g hỗn hợp Fe và Cu bằng dung dịch HNO3 dư. Khí X gồm NO và NO2 thu được 6,72 lít khí (đktc). Biết khối lượng Y = 12,2g và dung dịch z không chứa muối amoni.
a)Tính % khối lượng của Fe và Cu.
b)Cô cạn dung dịch z thu được bao nhiêu g muối khan.
Bài 2: Hòa tan hoàn toàn 12g hỗn hợp Fe và Cu ( tỉ lệ mol 1:1) bằng dung dịch HNO3 0,5M thu được V l (đktc). Hỗn hợp khí X gồm NO và NO2 (sản phẩm khử duy nhất) và dung dịch Y.
a)Tính % khối lượng của Fe và Cu.
b)Tính thể tích hỗn hợp khí X.
c)Tính thể tích HNO3 cần dùng ( biết lượng HNO3 lấy dư 10% so với lượng phản ứng).
d)Tính nồng độ mol các chất trong hỗn hợp khí X

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Posted by Vua Hài Kịch to Học Để Thi at December 15, 2018 at 9:44 AM

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