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2 years ago

when a reactive metal is added to water, bubbles or fizzing can be observed. Explain the appearance of the bubbles

Chemistry

1 answer:

MakcuM [25]2 years ago

7 0

Answer:

This is because of the release of hydrogen gas in the reaction.

Explanation:

Metals react with water and produce a metal oxide and hydrogen gas. It also starts floating due to the bubbles of hydrogen gas sticking to its surface.

For eg:

2Mg. + 2H2O --------> 2MgOH + H2

Here,

Metal taken is magnesium(2Mg) which when reacts with water(2H2O) to form its oxide form (2MgOH) and hydrogen gas(H2) is released which comes outside water as bubbles.

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2 years ago

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2 years ago

Which term describes a substance that increases the concentration of hydroxide (OH-) ions in solution? *

saul85 [17]

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3 years ago

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3 years ago

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An archer pulls her bowstring back 0.370 m by exerting a force that increases uniformly from zero to 264 N. (a) What is the equi

Arte-miy333 [17]

Answer:

713.51 N/m

Explanation:

Hook's Law: This law states that provided the elastic limit is not exceeded, the extension in an elastic material is directly proportional to the applied force.

From hook's law,

F = ke ...........................Equation 1

Where F = Force exerted on the bowstring, e = Extension/compression of the bowstring, k = Spring constant of the bow.

Make k the subject of the equation,

k = F/e ............................ Equation 2

Given: F = 264 N, e = 0.37 m.

Substitute into equation 2

k = 264/0.37

k = 713.51 N/m

Hence the spring constant of the bow = 713.51 N/m

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2 years ago

when a reactive metal is added to water, bubbles or fizzing can be observed. Explain the appearance of the bubbles​

when a reactive metal is added to water, bubbles or fizzing can be observed. Explain the appearance of the bubbles