evolution of gas is the example of the.......
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the gas can be seen as bubbles in an aqueous solution. Gas evolution reactions are one example of double displacement reactions, where two ionic compounds mix. The negatively charged ions, or anions, essentially switch partners, forming new chemical compounds in the product .
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A replacement reaction concerning zinc metal and hydrogen chloride:
Zn + 2 HCl → ZnCl
2 + H
2 (gas)
In this example, hydrogen gas in diatomic form is released.
A replacement reaction where gaseous hydrogen chloride and fluorine gas react to release diatomic chlorine gas (because fluorine is more electronegative):
2 HCl + F
2 → 2 HF + Cl
2 (gas)
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