how to calculate ph if given contain 0.63g og hno3 pet 100 ml solution
mols HNO3 = grams/molar mass = ?
Then M HNO3 = mols HNO3/0.1L = ?
Then pH = -log(HNO3)
To calculate the pH of the solution, you need to know the concentration of HNO3. Since you are given the mass of HNO3 and the volume of the solution, you will need to calculate the concentration first.
Step 1: Calculate the molarity (M) of HNO3:
Molarity = moles of solute / liters of solution
First, calculate the moles of HNO3:
Moles = mass / molar mass
The molar mass of HNO3 can be calculated using the atomic masses from the periodic table:
H: 1.01 g/mol
N: 14.01 g/mol
O: 16.00 g/mol
Molar mass of HNO3 = (1*1.01) + (1*14.01) + (3*16.00) = 63.02 g/mol
Moles of HNO3 = 0.63 g / 63.02 g/mol = 0.01 mol
Step 2: Calculate the concentration (C) of HNO3:
Concentration (C) = moles / volume in liters
Volume in liters = volume in mL / 1000
Volume in liters = 100 mL / 1000 = 0.1 L
Concentration (C) = 0.01 mol / 0.1 L = 0.1 M
Now that you have the concentration (C) of HNO3, you can proceed to calculate the pH.
Step 3: Calculate the pH using the formula:
pH = -log10(C)
pH = -log10(0.1) ≈ 1
Therefore, the pH of the solution is approximately 1.
To calculate the pH of a solution containing nitric acid (HNO3), you first need to determine the concentration of HNO3 in the solution. Given that you have 0.63g of HNO3 in a 100ml solution, you can calculate the concentration (C) in moles per liter (M).
Step 1: Calculate the number of moles of HNO3:
To do this, you need to know the molar mass of HNO3, which is approximately 63g/mol.
Number of moles (n) = Mass (m) / Molar mass (M)
n = 0.63g / 63g/mol
n ≈ 0.01mol
Step 2: Calculate the concentration (C) in M:
Concentration (C) = Number of moles (n) / Volume of solution (V)
Since the volume of the solution is given in milliliters (ml), you need to convert it to liters (L).
C = 0.01mol / 0.1L
C = 0.1M
Now, you have determined that the concentration of HNO3 in the solution is 0.1M.
Step 3: Calculate the pH using the concentration of HNO3:
To determine the pH, you can use the equation for the pH of a strong acid solution.
pH = -log10(C)
pH = -log10(0.1)
pH ≈ 1
Therefore, the pH of the solution is approximately 1.
Note: In this explanation, we assumed that HNO3 is a strong acid, which means it completely ionizes in water. If HNO3 is a weak acid, you need additional calculations to determine the concentration of H+ ions, which will affect the pH.