Question

Cr2O2=>K2CrO4=>K2Cr2=>Cr2(SO4)3=>K3{Cr(OH)6}

Answer 1

2 Cr2O3 + 4 K2CO3 + 3 O2 = 4 K2CrO4 + 4 CO2 2 K2CrO4 + H2SO4 = K2Cr2O7 + K2SO4 + H2O K2Cr2O7 + 3 Na2SO3 + 4 H2SO4 = Cr2(SO4)3 + K2SO4 + 3 Na2SO4 + 4 H2O Cr2(SO4)3 + 12 KOH(изб) = 2 K3[Cr(OH)6] + 3 K2SO4

Answer 2

The given sequence of chemical reactions involves the transformation of Cr2O2 to K3{Cr(OH)6}. Let's break down each step of the reaction sequence and explain it in detail.

Cr2O2 to K2CrO4

The first step is the conversion of Cr2O2 to K2CrO4. Cr2O2 is not a stable compound, and it readily reacts with oxygen to form K2CrO4. The reaction can be represented as follows:

2 Cr2O2 + O2 → 2 K2CrO4

K2CrO4 to K2Cr2

The second step involves the transformation of K2CrO4 to K2Cr2. This reaction occurs when K2CrO4 is heated. The reaction can be represented as follows:

2 K2CrO4 → K2Cr2 + O2

K2Cr2 to Cr2(SO4)3

The third step involves the conversion of K2Cr2 to Cr2(SO4)3. This reaction occurs when K2Cr2 is reacted with sulfuric acid (H2SO4). The reaction can be represented as follows:

K2Cr2 + 3 H2SO4 → Cr2(SO4)3 + 2 KHSO4

Cr2(SO4)3 to K3{Cr(OH)6}

The final step involves the transformation of Cr2(SO4)3 to K3{Cr(OH)6}. This reaction occurs when Cr2(SO4)3 is reacted with potassium hydroxide (KOH). The reaction can be represented as follows:

Cr2(SO4)3 + 6 KOH → K3{Cr(OH)6} + 3 K2SO4

So, the overall reaction sequence can be summarized as follows:

Cr2O2 → K2CrO4 → K2Cr2 → Cr2(SO4)3 → K3{Cr(OH)6}

Please note that the given reaction sequence is a hypothetical one, and it may not represent an actual chemical reaction. It is always important to consult reliable sources or perform experiments to verify the validity of any chemical reaction.

I hope this explanation helps! Let me know if you have any further questions.