Question

Цепочка превращений: KBr->Br2->HBr->NaBr->AgBr

Answer 1

2KBr+Cl2-->2KCl+Br2↑
Br2+H2-->2HBr (t)
HBr+NaOH-->NaBr+H2O
NaBr+AgNO3-->AgBr↓+NaNO3

Answer 2

Chemical Transformations: KBr -> Br2 -> HBr -> NaBr -> AgBr

The transformation of KBr to AgBr involves several chemical reactions. Here's a detailed breakdown of each step:

1. KBr to Br2: - The first step involves the oxidation of bromide ions (Br-) to produce bromine (Br2). - This can be achieved through the reaction with a strong oxidizing agent such as chlorine (Cl2) or by electrolysis of a solution containing bromide ions. - The balanced chemical equation for this reaction is: 2KBr + Cl2 → 2KCl + Br2.

2. Br2 to HBr: - The next step involves the addition of water to bromine to produce hydrobromic acid (HBr). - This reaction is a hydration reaction and can be represented by the equation: Br2 + H2O → HBr + HBrO.

3. HBr to NaBr: - The subsequent transformation involves the neutralization of hydrobromic acid (HBr) with sodium hydroxide (NaOH) to yield sodium bromide (NaBr) and water. - The balanced chemical equation for this reaction is: HBr + NaOH → NaBr + H2O.

4. NaBr to AgBr: - The final step in the chain of transformations is the precipitation reaction between sodium bromide (NaBr) and silver nitrate (AgNO3) to form silver bromide (AgBr) and sodium nitrate (NaNO3). - The balanced chemical equation for this reaction is: AgNO3 + NaBr → AgBr + NaNO3.

These sequential reactions demonstrate the conversion of potassium bromide (KBr) to silver bromide (AgBr) through a series of chemical transformations.

Is there anything else you would like to know about these chemical reactions?