A swimming pool is a solution as it is a solution of chlorinated water
Answer:
Concentration of hydrogen ion, ![[H^+]=5.0118*10^{-6} M](https://tex.z-dn.net/?f=%5BH%5E%2B%5D%3D5.0118%2A10%5E%7B-6%7D%20M)
Explanation:
pH is defined as the negative logarithm of hydrogen ion's concentration.
The lower the value of pH, the higher the acidic the solution is.
The formula for pH can be written as:
![pH=-log[H^+]](https://tex.z-dn.net/?f=pH%3D-log%5BH%5E%2B%5D)
Given,
pH of the saliva of Marco = 5.3
To calculate: Hydrogen ion concentration in the saliva
Thus, applying in the formula as:
![pH=-log[H^+]](https://tex.z-dn.net/?f=pH%3D-log%5BH%5E%2B%5D)
![5.3=-log[H^+]](https://tex.z-dn.net/?f=5.3%3D-log%5BH%5E%2B%5D)
So,
![log[H^+]=-5.3](https://tex.z-dn.net/?f=log%5BH%5E%2B%5D%3D-5.3)
![[H^+]=10^{(-5.3)}](https://tex.z-dn.net/?f=%5BH%5E%2B%5D%3D10%5E%7B%28-5.3%29%7D)
![[H^+]=5.0118*10^{-6} M](https://tex.z-dn.net/?f=%5BH%5E%2B%5D%3D5.0118%2A10%5E%7B-6%7D%20M)
Elements that make up the compounds that are characterized as covalent are mostly in the right part of the periodic table.
Alkalyne metals and alkalyne earth metals, which are located in the left part of the table, and given that those elements form ions with relative ease they make up ioinic compounds.
Covalent compounds are made up mainly of a non metal element and a metal elements with low metallic properties.
The metallic character of the elements decrease as you go to the right of the periodic table, that is why you found those elements in the right part of the periodic talbe.
Answer:
% yield = 73.48 %
Explanation:
The fermentation reaction is:
C₆H₁₂O₆ → 2C₂H₅OH + 2CO₂
The percent yield of C₂H₅OH is given by:
<em>where
: is the obtained mass of C₂H₅OH = 67.7g and
: is the theoretical mass of C₂H₅OH. </em>
The theoretical mass of C₂H₅OH is calculated knowing that 1 mol of C₆H₁₂O₆ produces 2 moles of C₂H₅OH:
<em>where M: is the molar mass of C₂H₅OH = 46.068 g/mol</em>
Hence, the percent yield of C₂H₅OH is:

I hope it helps you!