nguyenhoaikimngan2

2 tháng trước

Cho các chất sau: K2O, SO3, Cu, Al, Ba(NO3)2, CuSO4. Viết phương trình phản ứng phù hợp của các chất: a) Tác dụng với nước tạo dung dịch làm quỳ tím hóa xanh b) Tác dụng với dung dịch H2SO4 loãng tạo kết tủa trắng không tan trong axit c) Tác dụng với dd KOH tạo kết tủa xanh d) Tác dụng với dung dịch HCl tạo ra khí.

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Aura Aura

2 tháng trước

Đáp án:

Giải thích các bước giải:

a) `K_2O`

`K_2O + H_2O → 2KOH`

b) `Ba(NO_3)_2`

`Ba(NO_3)_2 + H_2SO_4 → BaSO_4↓ + 2HNO_3`

c) `CuSO_4`

`CuSO_4 + 2KOH → Cu(OH)_2↓ + K_2SO_4`

d) Al

`2Al + 6HCl → 2AlCl_3 + 3H_2↑`

Chúc bạn học tốt #aura

hoangminhava

2 tháng trước

$a)K_2O$

$PTHH:K_2O+H_2O\to 2KOH$(quỳ hóa xanh)

$b)Ba(NO_3)_2$

$PTHH:Ba(NO_3)_2+H_2SO_4\to BaSO_4\downarrow(trắng)+2HNO_3$

$c)CuSO_4$

$PTHH:CuSO_4+2KOH\to K_2SO_4+Cu(OH)_2\downarrow(xanh)$

$d)Al$

$PTHH:2Al+6HCl\to 2AlCl_3+3H_2\uparrow(khí)$

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