Câu 17:(2,0 điểm) Cho 40,25 ml dung dịch rượu etylic 500 phản ứng hoàn toàn với lượng dư kim loại natri
(Na).
a. Viết phương trình hóa học của phản ứng xảy ra.
b. Tính khối lượng rượu etylic nguyên chất đã tham gia phản ứng. Biết rượu etylic nguyên chất có khối
lượng riêng là 0,8 g/ml.
c. Tính thể tích khí hidro sinh ra (ở đktc). Biết khối lượng riêng của nước là 1,0 g/ml.
Câu 18: (1,0 điểm).
Chia m gam glucozơ làm 2 phần bằng nha:
Phần 1 đem thực hiện phản ứng tráng bạc thu được 27gam Ag.
Phần 2 cho lên men rượu thu được Vml rượu (D= 0,8 gam/ml)
Giả sử phản ứng tráng bạc xảy ra hoàn toàn, phản ứng lên men đạt 80%. Tính V
(Cho nguyên tử khối: Ag= 108, Zn= 56, Ca= 40, Na= 23, C=12; H=1;O=16; K= 39)
Học sinh được sử dụng bảng hệ thống tuần hoàn các nguyên tố hóa học.
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