Question

Как можно отличить сплав цинка с медью от чистой меди? напишите уравнение реакций.

Answer 1

Медь при н.у. с серной не реагирует, нужен окислитель. Зато цинк хорошо реагирует с серной с образованием соли и выделением кислоты. цинк + серная = сульфат цинка + водород. Такая реакция.

Answer 2

How to Distinguish Zinc-Copper Alloy from Pure Copper

To distinguish a zinc-copper alloy from pure copper, you can perform a simple chemical test. When a zinc-copper alloy is treated with hydrochloric acid, it produces a different reaction compared to pure copper. Here's how you can differentiate between the two:

1. Chemical Test: - Treat the sample with hydrochloric acid. - Observe the reaction.

2. Reaction Equation: - The reaction equation for the test is as follows: ``` Zn + 2HCl → ZnCl2 + H2 ``` This reaction produces zinc chloride and hydrogen gas.

3. Observation: - If the sample is a zinc-copper alloy, it will produce a different reaction compared to pure copper when treated with hydrochloric acid. - The specific reaction observed will help distinguish between the zinc-copper alloy and pure copper.

By performing this simple chemical test, you can effectively differentiate between a zinc-copper alloy and pure copper.