Alai is comparing the physical property of two materials. He is hitting each with a hammer to observe what happens. What physica
2 answers:
You might be interested in
<u>Answer:</u> The pH of the solution after addition of KOH is 3.84
<u>Explanation:</u>
We are given:
pH of buffer = 3.75
of formic acid = 3.75
Using Henderson-Hasselbalch equation for formate buffer:
Putting values in above equation, we get:
We are given:
Concentration of formate buffer = 0.100 M
As, the volume of buffer is the same. So, the concentration is taken as number of moles of formate ions as well as formic acid
To calculate the number of moles for given molarity, we use the equation:
Molarity of KOH = 1.00 M
Volume of solution = 5 mL
Putting values in above equation, we get:
The chemical reaction for formic acid and KOH follows the equation:
Initial: 0.05 0.005 0.05
Final: 0.045 - 0.055
Volume of solution = 500 + 5 = 505 mL = 0.505 L (Conversion factor: 1 L = 1000 mL)
To calculate the pH of acidic buffer, we use the equation given by Henderson Hasselbalch:
We are given:
= negative logarithm of acid dissociation constant of formic acid = 3.75
pH = ?
Putting values in above equation, we get:
Hence, the pH of the solution after addition of KOH is 3.84
Answer:
The number of atoms in the gemstones of that tiara is .
Explanation:
Number of diamonds ion tiara = 888
Mass of each diamond = 1.0 carat = 0.200 g (given)
Mass of 888 diamonds in tiara:
Given that diamond is a form of carbon.
Atomic mass of carbon atom = 12 g/mol
Moles of 77.600 g of carbon =
Number of atoms of carbon 14.800 moles:
The number of atoms in the gemstones of that tiara is .