(i) The metal preferred for the preparation of hydrogen from water is usually a reactive metal like Sodium (Na) or Potassium (K). Here are the steps:

1. Sodium or Potassium is added to water.
2. The metal reacts with water to form metal hydroxide and hydrogen gas.
3. The reaction is highly exothermic, so the hydrogen gas produced will ignite, showing a flame.

(ii) The metal preferred for the preparation of hydrogen from acid is usually a less reactive metal like Zinc (Zn) or Iron (Fe). Here are the steps:

1. Zinc or Iron is added to an acid, usually Hydrochloric acid or Sulfuric acid.
2. The metal reacts with the acid to form a salt and hydrogen gas.
3. The hydrogen gas can be collected and used for various purposes.

Question

(i) The metal preferred for the preparation of hydrogen from water is usually a reactive metal like Sodium (Na) or Potassium (K). Here are the steps:

1. Sodium or Potassium is added to water.
2. The metal reacts with water to form metal hydroxide and hydrogen gas.
3. The reaction is highly exothermic, so the hydrogen gas produced will ignite, showing a flame.

(ii) The metal preferred for the preparation of hydrogen from acid is usually a less reactive metal like Zinc (Zn) or Iron (Fe). Here are the steps:

1. Zinc or Iron is added to an acid, usually Hydrochloric acid or Sulfuric acid.
2. The metal reacts with the acid to form a salt and hydrogen gas.
3. The hydrogen gas can be collected and used for various purposes.

Knowee AI · Accepted Answer

(i) The metal preferred for the preparation of hydrogen from water is usually a reactive metal like Sodium (Na) or Potassium (K). Here are the steps:

1. Sodium or Potassium is added to water.
2. The metal reacts with water to form metal hydroxide and hydrogen gas.
3. The reaction is highly exothermic, so the hydrogen gas produced will ignite, showing a flame.

(ii) The metal preferred for the preparation of hydrogen from acid is usually a less reactive metal like Zinc (Zn) or Iron (Fe). Here are the steps:

1. Zinc or Iron is added to an acid, usually Hydrochloric acid or Sulfuric acid.
2. The metal reacts with the acid to form a salt and hydrogen gas.
3. The hydrogen gas can be collected and used for various purposes.

Which metal is preferred for the preparation of hydrogen(i) from water?(ii) from acid?

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