To determine the ratio of [a–]/[ha] of a solution of formic acid, we use the Henderson–Hasselbalch equation which relates the pH, pKa and the concentration of the ions in the solution. It is expressed as:
pH = pkA + log [a–]/[ha]
Substituting the values given,
3.75 = 3.75 + log [a–]/[ha]
0 = log [a–]/[ha]
[a–]/[ha] = 1
Therefore, the concentration of the CHOO- ion and the formic acid are equal.
The amount of maximum mass of ethyl alcohol that could we boil with 1000 J of heat, starting from 20°C is 7.08 grams.
<h3>How do we calculate the mass?</h3>
Mass of the ethyl alcohol will be calculated by using the below equation as:
Q = mcΔT, where
- Q = absorbed heat = 1000 J
- m = mass of ethyl alcohol = ?
- c = specific heat of ethyl alcohol = 2.42 J/g.°C
- ΔT = change in temperature = (78.37°C - 20°C) = 58.37°C
On putting all these values, we get
m = 1000 / (2.42)(58.37) = 7.079 = 7.08g
Hence required mass of ethyl alcohol is 7.08grams.
To know more about absorbed heat, visit the below link:
brainly.com/question/16559442
#SPJ4
Answer:
What Structures??
Explanation:
Can you please explain the question more
Measuring is the act of determining the size of something using an instrument of measurement.
It would have to be 40.0 only because it wouldn’t add up
