When metals react with acids, if there is a reaction, then **bubbling/effervescence** is seen, which is a sign gas is being given off. This gas is often hydrogen gas ($ H_2 $), which is produced when metals displace hydrogen ions from the acid. The reaction can be generally represented by the equation:

$$ \text{Metal} + \text{Acid} \rightarrow \text{Metal Salt} + \text{Hydrogen Gas} $$

For example, when zinc reacts with hydrochloric acid, the reaction can be written as:

$$ \text{Zn} + 2\text{HCl} \rightarrow \text{ZnCl}_2 + \text{H}_2 \uparrow $$

Here, the upward arrow indicates that hydrogen gas is released during the reaction, resulting in effervescence.

Question

When metals react with acids, if there is a reaction, then **bubbling/effervescence** is seen, which is a sign gas is being given off. This gas is often hydrogen gas ($ H_2 $), which is produced when metals displace hydrogen ions from the acid. The reaction can be generally represented by the equation:

$$ \text{Metal} + \text{Acid} \rightarrow \text{Metal Salt} + \text{Hydrogen Gas} $$

For example, when zinc reacts with hydrochloric acid, the reaction can be written as:

$$ \text{Zn} + 2\text{HCl} \rightarrow \text{ZnCl}_2 + \text{H}_2 \uparrow $$

Here, the upward arrow indicates that hydrogen gas is released during the reaction, resulting in effervescence.

Knowee AI · Accepted Answer

When metals react with acids, if there is a reaction, then **bubbling/effervescence** is seen, which is a sign gas is being given off. This gas is often hydrogen gas ($ H_2 $), which is produced when metals displace hydrogen ions from the acid. The reaction can be generally represented by the equation:

$$ \text{Metal} + \text{Acid} \rightarrow \text{Metal Salt} + \text{Hydrogen Gas} $$

For example, when zinc reacts with hydrochloric acid, the reaction can be written as:

$$ \text{Zn} + 2\text{HCl} \rightarrow \text{ZnCl}_2 + \text{H}_2 \uparrow $$

Here, the upward arrow indicates that hydrogen gas is released during the reaction, resulting in effervescence.

3.When metals react with acids, if there is a reaction then _______/effervescence is seen which is a sign a gas is being given off

Question

3. When metals react with acids, if there is a reaction then _______/effervescence is seen which is a sign a gas is being given off.

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