Name the gas evolved when dilute hcl reacts with sodium hydrogen carbonate how is it recognised

Name the gas evolved when dilute HCl reacts with sodium hydrogen carbonate. How is it recognized?
7.8: Acid
Name the gas evolved when dilute HCl reacts with sodium hydrogen carbonate. How is it recognised?

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Name the gas evolved when dilute HCl reacts with sodium hydrogen carbonate. How is it recognized?

C O 2 gas is evolved. The reaction is as follows: S o d i u m h y d r o g e n c a r b o n a t e N a H C O 3 + H y d r o g e n c h l o r i d e H Cl ( a q ) → S o d i u m c h l o r i d e N a Cl ( a q ) + W a t e r H 2 O ( l ) + C a r b o n d i o x i d e C O 2 ↑ When the produced gas is passed through lime water, lime water turns milky which confirms that the evolved gas is C O 2 C a l c i u m h y d r o x i d e ( L i m e w a t e r ) C a ( O H ) 2 ( a q ) + C O 2 ( g ) → W h i t e P r e c i p i t a t e C a C O 3 ( s ) + H 2 O ( l )

7.8: Acid

Neutralization Reactions Acids and bases react chemically with each other to form salts. A salt is a general chemical term for any ionic compound formed from an acid and a base. In reactions where the acid is a hydrogen-ion-containing compound and the base is a hydroxide-ion-containing compound, water is also a product. The general reaction is as follows: \[\text \] Solution Solutions to Example 7.8.1 Steps Explanation Equation Write the unbalanced equation. This is a double displacement reaction, so the cations and anions swap to create new products. Ca(OH) 2(aq) + HNO 3(aq) → Ca(NO 3) 2(aq) + H 2O(ℓ) Balance the equation. Because there are two OH − ions in the formula for Ca(OH) 2, we need two moles of HNO 3 to provide H + ions Ca(OH) 2(aq) + 2HNO 3(aq) → Ca(NO 3) 2(aq) + 2H 2O(ℓ) Additional step: identify the salt. The salt formed is calcium nitrate. Gas Evolving Reactions A gas evolution reaction is a chemical process that produces a gas, such as oxygen or carbon dioxide. In the following examples, an acid reacts with a carbonate, producing salt, carbon dioxide, and water, respectively. For example, nitric acid reacts with sodium carbonate to form sodium nitrate, carbon dioxide, and water (Table \(\PageIndex\) The gas-evolving experiment lime water is illustrated in the following video: Video \(\PageIndex\), and the acid, \(H^+\), is reduced to \(H_2(g)\). The oxidation of metals by strong acids is another common example of a gas evolution reaction. Contributors & Affi...