De kiem tra hoa hoc 9 tiet 20

Trường THCS Trung ý
Baì kiểm tra hóa học lớp 9 (tiết 20)
thời gian 45 phút
Họ tên học sinh.......................................................................


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Lơi phê


đề bài
1, Hảy viết mỗi loại hai phương trình phản ứng điều chế các chất theo sơ đồ sau
a,oxit bazo Muối b, Ba zơ Muối
c, O xít a xít Muối c, A xít Muối
d, Muối Ba zo e, Muối A xit
g, O xit ba zơ Ba zo h, O xit a xít A xit

2, Cho 300ml dung dịch HCl nồng độ a mol/ lit tác dụng vừa đủ với 7,5 g hổn Na2CO3 và NaCl thì thu được 672 ml khí (đktc)
a, Tính giá trị của a
b, Tính khối lượng muối thu được sau phản ứng
c, Tính thành phần phần % theo khối lượng mỗi muối trong hỗn hợp ban đầu
bài làm
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