Which is the correct Lewis structure for acetylene (C2H2)?
2 answers:
Explanation :
Lewis-dot structure : Lewis-dot structure shows the bonding between the atoms of a molecule. It also shows the number of paired and unpaired electrons present in the molecule.
The given molecule is, Acetylene
As we know that carbon has '4' valence electrons and hydrogen has '1' valence electron.
Therefore, the total number of valence electrons in acetylene, = 2(4) +2(1) = 10
According to Lewis-dot structure, there are 10 number of bonding electrons and 0 number of non-bonding electrons.
The Lewis-dot structure of acetylene is shown below.
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Answer:
a) pH = 4.68 (more effective)
b) pH =4.44.
Explanation:
The pH of buffer solution is obtained by Henderson Hassalbalch's equation.
The equation is:
a) pKa of acetic acid = 4.74
[salt] = [CH₃COONa] = 1.4 M
[acid] = [CH₃COOH] = 1.6 M
This is more effective as there is very less difference in the concentration of salt and acid.
b) pKa of acetic acid = 4.74
[salt] = [CH₃COONa] = 0.1 M
[acid] = [CH₃COOH] = 0.2 M