In a test- Rashi has to write the chemical equation for the formation of hydrochloric acid- She wrote-H 2-2 Cl - 2 HClThe teacher marked the answer wrong- Why-A- The equation is not balanced-B- Hydrogen and chlorine do not react to form hydrochloric acid-C- In this 2 molecule of chlorine was used instead of 2 atoms of chlorine-D- In this 2 atoms of chlorine were used insteadof1 molecule of chlorine-

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In a test, Ra...

Question

In a test, Rashi has to write the chemical equation for the formation of hydrochloric acid. She wrote:

$H_{2} + 2 C l \to 2 H C l$

The teacher marked the answer wrong. Why?

The equation is not balanced.

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Hydrogen and chlorine do not react to form hydrochloric acid.

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In this 2 atoms of chlorine were used insteadof1 molecule of chlorine.

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In this 2 molecule of chlorine was used instead of 2 atoms of chlorine.

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Solution

The correct option is C
In this 2 atoms of chlorine were used insteadof1 molecule of chlorine.

The correct equation should be:

$H_{2} + C l_{2} \to 2 H C l$

2Cl means 2 atoms of chlorine while $C l_{2}$ means 1 molecule of chlorine formed from 2 atoms.

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In a test, Rashi has to write the chemical equation for the formation of Hydrochloric acid. She wrote

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The teacher marked the answer wrong. Why is it so?

In a test, Rashi has to write the chemical equation for the formation of hydrochloric acid. She wrote

$H_{2} + 2 C l \to 2 H C l$

The teacher marked the answer wrong. Why is it so?

One molecule of hydrogen and one molecule of chlorine react to give __ molecule(s) of hydrochloric acid.

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In a test, Rashi has to write the chemical equation for the formation of hydrochloric acid. She wrote: H2+2Cl→2 HCl The teacher marked the answer wrong. Why?

The correct option is C In this 2 atoms of chlorine were used insteadof1 molecule of chlorine. The correct equation should be: H2+Cl2→2 HCl 2Cl means 2 atoms of chlorine while Cl2 means 1 molecule of chlorine formed from 2 atoms.

In a test, Rashi has to write the chemical equation for the formation of hydrochloric acid. She wrote:

$H_{2} + 2 C l \to 2 H C l$

The teacher marked the answer wrong. Why?

The correct option is C
In this 2 atoms of chlorine were used insteadof1 molecule of chlorine.

The correct equation should be:

$H_{2} + C l_{2} \to 2 H C l$

2Cl means 2 atoms of chlorine while $C l_{2}$ means 1 molecule of chlorine formed from 2 atoms.