Answer:
Explanation:
As we know that the formula for pH is
![pH = -[log H+]\\](https://tex.z-dn.net/?f=pH%20%3D%20-%5Blog%20H%2B%5D%5C%5C)
It is also given in the question that one pH unit represents the 10 fold change in the concentration of hydrogen ion.
Now for lemon juice whose pH is 2, hydrogen ion concentration is equal to
And for pure water whose pH is 
, hydrogen ion concentration is equal to
Thus, the H+ ion concentration in lemon juice is 
times greater than the pure water.
There are a whole of three natural sources of water. They are categorized as rain water, underground water and surface water. Here is a look at each and what provides these sources. Rain water contains other references such as snow and additional types of precipitation.
Water is one of the natural resources, which are found in an adequate amount. It is an important source for the existence of life on the planet earth. It is widely used for various purposes such as drinking, washing, bathing, cleaning, cooking, irrigation, and other industrial and domestic uses.
<h3> Which is the enormous water resource on Earth?</h3>
Oceans, which are the biggest source of surface water, comprise approximately 97 percent of the Earth's surface water.
To learn more about natural sources, refer
brainly.com/question/24623157
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<span>B. wherever mechanical digestion occurs, chemical digestion also occurs</span>
