Cu
Câu 18. (2 điểm): Cho 47 gam Kali oxit (K2O) tác dụng hết với nước thu được dung dịch bazơ.
a) Viết PTHH xảy ra.
b) Tính khối lượng bazơ thu được sau phản ứng?
c) Tính khối lượng dung dịch H2SO4 20% cần dùng để trung hoà hết lượng dung dịch bazơ
nói trên.
(Biết K=39, O=16, H=1, S=32, Zn=65, Ca=40, C=12)
BÀI LÀM:
I. PHẦN TRẮC NGHIỆM
Câu 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Đ/A
II. PHẦN TỰ LUẬN
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