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Genrish500 [490]
3 years ago
13

Is crumpling a sheet of paper a physical or chemical change? Why?

Physics
2 answers:
alex41 [277]3 years ago
7 0
Crumpling a sheet of paper would be physical change. Only the appearance of the paper changes. The makeup of the paper is not being altered.
rjkz [21]3 years ago
3 0
Hi there!

Crumpling a piece of paper is a physical change.

Since there aren't any types of chemical reactions or chemical substance reactions when you crumple a piece of paper, it is a physical change.

Hope this helps!
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Ksp for agbr is 5x10-13. what is the maximum concentration of silver ion that you can have in a 0.1 m solution of nabr?
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Answer : The maximum concentration of silver ion is 5\times 10^{-12}m

Solution : Given,

K_{sp} for AgBr = 5\times 10^{-13}

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NaBr(aq)\rightleftharpoons Na^++Br^-

The concentration of NaBr solution is 0.1 m that means,

[Na^+]=[Br^-]=0.1m

The equilibrium reaction for AgBr is,

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At equilibrium                     s       s

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K_{sp}=[Ag^+][Br^-]

The concentration of Ag^+ = s

The concentration of Br^- = 0.1 + s

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5\times 10^{-13}=(s)(0.1+s)

By rearranging the terms, we get the value of 's'

s=5\times 10^{-12}m

Therefore, the maximum concentration of silver ion is 5\times 10^{-12}m.

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