Explanation:
hope it helps you understand moles
Mixing baking soda and vinegar to make bubbles of carbon dioxide.
Answer:
Nitrogen gas is filled inside the electric bulb because it doesn't react with the hot filament. Then, it will carry heat away form the filament to cool it.
<span>we are going to use H-H equation:
PH = Pka + log[conjugate base]/[weak acid]
when we have here the conjugate base is NaF
and the weak acid is HF.
so, we are going to use the Ka value to get the value of Pka.
when Pka = -logKa
= -log7.2 X 10^-4
= 3.14
then we will substitution on H-H equation:
</span>∴<span>PH = 3.14 + log (0.623)/(1.41) = 2.99</span>
