A 1. 30 m solution of the weak acid ha is created. if the ka of the weak acid is 3. 06×10−9, the pH of the solution is 3.71.
Firstly we will get the equilibrium concentration, we will write the ICE chart for the reaction.
HA ------ (H+) + (A-)
1.30 0 0
1.30-x x x
Now,
the equilibrium expression can be given as
Ka = [H+] [A-]/[HA]
3. 06×10−9 = x^2/(1.30-x)
x = 1.99 × 10^(-4)
Therefore, the concentration of [H+] is 1.99 × 10^(-4).
<h3>Calculation of pH</h3>
pH = -log[H+]
pH = -log(1.99 × 10^(-4))
pH = 4-0.29
pH = 3.71
Thus, we find that the value pH of the solution is 3.71.
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B is the answer to it!!!!!
Answer:
when it reduces heat.
Explanation:
Thermal energy is transferred to material,the motion of its particles speeds up and it's temperature differences.Insulating materials are bad conductors and so this reduces the heat loss by conduction.The material also prevents air circulating inside the cavity,therefore reducing heat loss by convection.Heat loss through the roof can be reduced by laying loft insulation.
Explanation:
I just answer on a different account
