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First Order Reaction

From the reco...

Question

From the recorded data:
Weight of U-tube_ $20.36$ g
Weight of U-tube and calcium chloride before $39.32$ g
Weight of U-tube and calcium chloride after__ $57.32$ g
Weight of boat and contents(copper oxide)before_ $30.23$ g
Weight of boat and contents after $14.23$ g
Weight of boat_ $5.00$ g
What conclusion can be derived from the data collected?

A

Oxygen was lost from the

C a C l_{2}

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B

Oxygen was generated in the U-tube

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C

Water was formed from the reaction

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D

Hydrogen was absorbed by the

C a C l_{2}

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E

CuO was formed in the decomposition

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Solution

The correct option is C Water was formed from the reaction
Weight of U-tube and calcium chloride before..............39.32g
Weight of U-tube and calcium chloride after................57.32g
Since Weight of U-tube and calcium chloride after is higher than the Weight of U-tube and calcium chloride before, we can say that the excess weight is due to water which is formed during the reaction.
Calcium chloride is a drying agent and absorbs water. The increase in the weight corresponds to water formed.

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Similar questions

Q. From recorded data:
Weight of U-tube______

20.36

g
Weight of U-tube and calcium chloride before______

39.32

g
Weight of U-tube and calcium chloride after_______

57.32

g
Weight of boat and contents(copper oxide)before_____

30.23

g
Weight of boat and contents after_____

14.23

g
Weight of boat_____

5.00

g
What is the reaction for the first

C a C l_{2}

Q. From the recorded data:
Weight of U-tube

= 20.36

g
Weight of U-tube and calcium chloride before

= 39.32

g
Weight of U-tube and calcium chloride after

= 57.32

g
Weight of boat and contents(copper oxide)before

= 30.23

g
Weight of boat and contents after

= 14.23

g
Weight of boat

= 5.00

g
Determine the ratio of the mass of water formed to the mass of hydrogen used in the formation of water?

Q. Recorded data:
Before

:

C u O +

= 62.869

g

C a C l_{2} +

= 80.483

g
After:Porcelain boat

+

= 54.869

g

C a C l_{2} +

= 89.483

Z n (s) + 2 H C l (a q) \to Z n C l_{2} (a q) + H_{2} (g)

H_{2} (g) + C u O (s) \to H_{2} O (g) + C u (s)

What was the reason placing tube of

C a C l_{2}

between the generator and the tube containing the porcelain boat?

Q. Recorded data:
Before

:

C u O +

= 62.869 g

C a C l_{2} +

= 80.483 g

After:Porcelain boat

+

= 54.869 g

C a C l_{2} + U

= 89.483 g

Z n (s) + 2 H C l (a q) \to Z n C l_{2} (a q) + H_{2} (g)

H_{2} (g) + C u O (s) \to H_{2} O (g) + C u (s)

What conclusion can you draw after the completion of this experiment?

Q. Recorded data:
Before

:

C u O +

= 62.869

g

C a C l_{2} +

= 80.483

g
After:Porcelain boat

+

= 54.869

g

C a C l_{2} +

= 89.483

Z n (s) + 2 H C l (a q) \to Z n C l_{2} (a q) + H_{2} (g)

H_{2} (g) + C u O (s) \to H_{2} O (g) + C u (s)

Which of the following is an observation rather than a conclusion?

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