Answer:
10.3
Explanation:
The pH of a substance is a number spanning from 0 to 14.
A substance with pH between 0 and 7 is said to be acid, while a substance with pH between 7 and 14 is said to be basic. A substance with pH of 7 is a neutral substance.
The pH of a solution can be calculated using the formula:
where
is the concentration of hydronium ion in the solution
In this problem, we have a concentration of hydronium ion in the solution equal to
Therefore, we can apply the formula above to calculate the pH of the solution, and we find:
So, the pH of this solution is 10.3.
Answer:
Explanation:
Given the amount of heat absorbed and the amount of substance in moles, we may calculate the heat of vaporization. Heat of vaporization is defined as the amount of heat per 1 mole of substance required to evaporate that specific substance.
Based on the value of heat of vaporization, we will identify the substance. Firstly, let's calculate the heat of vaporization:
Secondly, let's use any table for heat of vaporization values for substances. We identify that the heat of vaporization of is 18.7 kJ/mol
The answer to the question is D
<u>Answer:</u> The molarity of anions in the solution is 0.0316 M
<u>Explanation:</u>
To calculate the molarity of solution, we use the equation:
We are given:
Given mass of iron (II) chloride = 0.10 g
Molar mass of iron (II) chloride = 126.75 g/mol
Volume of solution = 50 mL
Putting values in above equation, we get:
1 mole of iron (II) chloride produces 1 mole of ions and 2 moles of ions
So, concentration of chloride ions (anions) in the solution =
Hence, the molarity of anions in the solution is 0.0316 M