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Verdich [7]
2 years ago
7

The difference between Physical/Chemical properties and Physical/Chemical changes

Chemistry
1 answer:
AfilCa [17]2 years ago
6 0
Physical changes can be reversed and chemical changes can’t be reversed. A physical property is a characteristic which can be identified without changing the substance but to identify a chemical property, you do have to change the substance.
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Calcula el pH de las siguientes sustancias formadas durante una erupción volcánica:
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<em>Calculate the pH of the following substances formed during a volcanic eruption: </em>

<em>• Acid rain if the [H +] is 1.9 x 10-5 </em>

<em>• Sulfurous acid if [H +] = 0.10 </em>

<em>• Nitric acid if [H +] = 0.11</em>

<em />

<h3>Further explanation  </h3>

pH is the degree of acidity of a solution that depends on the concentration of H⁺ ions. The greater the value the more acidic the solution and the smaller the pH.  

pH = - log [H⁺]  

  • pH acid rain

\tt pH=-log[1.9\times 10^{-5}]\\\\pH=5-log1.9\\\\pH=4.72

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\tt pH=-log[10^{-1}]\\\\pH=1

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\tt pH=-log[11\times 10^{-2}]\\\\pH=2-log~11=0.959

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