Answer:
1
The heat of reaction is
The enthalpy is
2
The concentration of HCl is
Explanation:
From the question we are told that
The volume of is
The number of concentration of is
The volume of HCl is
The number of concentration of is
The temperature difference is
Now the heat of reaction is mathematically represented as
Where
is the specific heat of water with value
Now
where is the molar mass of NaOH with the value of 0.04 kg/mol
So
While
Where is the molar mass of with the value of 0.03646 kg/mol
So
=>
The enthalpy is mathematically represented as
=>
From the second question we are told that
The volume of HCl is
The volume of NaOH is
The concentration of NaOH is
The first temperature change is
The second volume of
The mass of NaOH is
substituting values
The mass of the product formed is
substituting values
The multiplication by 1000 is to convert it from kg to grams
Now the mass of HCl is
substituting values
Now the concentration of HCl is
The multiplication of is to convert it from kg/mol to g/mol
Just so you know you’re picture isn’t coming up
Ka expression for any substance:
Ka = [H+] [A-] / [HA]
In this case,
Ka = [H+][C₃H₅O₃-]/[C₃H₆O₃]
1.4 x 10⁻⁴ = [H+] [C₃H₅O₃-] / [C₃H₆O₃]
pKa = -log(Ka)
pH = -log([H+])
The difference between pKa and pH is that pH is the negative logarithm of only the concentration of hydrogen ions, while pKa is the negative logarithm of the ratio of the product of the concentrations of hydrogen ions and concentration of base to the concentration of acid.