Question

1A Which of the following solvents does not contain water?

water

sodium bicarbonate

sodium hydroxide

hydrochloric acid

diethyl ether

1B write a chemical equation between

4-chloroaniline and hydrochloric acid

Answer 1

Answer 2

1A: Which solvent does not contain water?

Answer:

$$\boxed{{\displaystyle \text{Diethyl ether}}}$$

Explanation:

• Water is H₂O (obviously contains water).

• Sodium bicarbonate (NaHCO₃) and sodium hydroxide (NaOH) are typically used in aqueous solutions (dissolved in water).

• Hydrochloric acid (HCl) is commonly used as a concentrated aqueous solution.

• Diethyl ether (C₄H₁₀O) is an organic solvent and does not contain water unless contaminated.

• 
  

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1B: Chemical equation between 4-chloroaniline and hydrochloric acid

Reaction:
4-Chloroaniline (a weak base) reacts with HCl to form a water-soluble hydrochloride salt.

Chemical Equation:

$$\boxed{{\displaystyle {\text{C}}_6{\text{H}}_4(\text{Cl}){\text{NH}}_2+\text{HCl}\to {\text{C}}_6{\text{H}}_4(\text{Cl}){\text{NH}}_3^{+}{\text{Cl}}^{-}}}$$

Explanation:

• The amino group (–NH₂) on 4-chloroaniline is protonated by HCl, forming the ionic salt 4-chloroanilinium chloride.

• This reaction is typical for amines (organic bases) with strong acids.