Đáp án: Bằng phương pháp hoá học e hãy phân biệt các lọ có chứa dung dịch sauHCl,H2SO4,BACl2,NaOH(viết pthh nếu có) Mn giúp e vs - Đưa quỳ tím vào các dd NaOH hoá xanh, BaCl2 ko đổi màu, 2 axit hoá đỏ Nhỏ BaCl2 vào 2 dd còn lại H2SO4 có kết tủa trắng, HCl ko hiện tượng BaCl2+ H2SO4 -> BaSO4+ 2HCl

Dương Minh Khôi

Bằng phương pháp hoá học e hãy phân biệt các lọ có chứa dung dịch sau:HCl,H2SO4,BACl2,NaOH(viết pthh nếu có) Mn giúp e vs

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Quang Cường

Đưa quỳ tím vào các dd. NaOH hoá xanh, BaCl2 ko đổi màu, 2 axit hoá đỏ. Nhỏ BaCl2 vào 2 dd còn lại. H2SO4 có kết tủa trắng, HCl ko hiện tượng

BaCl2+ H2SO4 -> BaSO4+ 2HCl

irene04

2 năm trước

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Bằng phương pháp hoá học e hãy phân biệt các lọ có chứa dung dịch sau:HCl,H2SO4,BACl2,NaOH(viết pthh nếu có) Mn giúp e vs

2 câu trả lời

if you don't wear a helmet , you can't ride your bike => Unless

Choose the best answer.
I think you should buy ___ pack of mineral water instead. And you can also buy _ snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ____ cookies and soft candies.

Choose the best answer.
We should decorate our living room with _ orange banner. We also need ____ ribbons, balloons, party hats and costume.

Choose the best answer.
I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.

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Bằng phương pháp hoá học e hãy phân biệt các lọ có chứa dung dịch sau:HCl,H2SO4,BACl2,NaOH(viết pthh nếu có) Mn giúp e vs

2 câu trả lời

if you don't wear a helmet , you can't ride your bike => Unless

Choose the best answer.I think you should buy _____ pack of mineral water instead. And you can also buy _____ snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ______ cookies and soft candies.

Choose the best answer.We should decorate our living room with _____ orange banner. We also need ________ ribbons, balloons, party hats and costume.

Choose the best answer.I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.

Đề thi - đề kiểm tra Xem thêm

Choose the best answer.
I think you should buy ___ pack of mineral water instead. And you can also buy _ snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ____ cookies and soft candies.

Choose the best answer.
We should decorate our living room with _ orange banner. We also need ____ ribbons, balloons, party hats and costume.

Choose the best answer.
I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.