Question #176711

Find the pH of the following: Show all work

- 0.020 moles of HCl in 20.0 L of water
- 6 grams NaOH ( MW 40 g/mol) in 15 L of water
- The titration where Va= 5 mL Vb= 20 L Ma= 0.40 Mb= ?

Expert's answer

"M= \\frac{0.020}{20}=1.0\u00d710^{-3}"

pH = -log (M)

pH= "-log(1.0\u00d710^{-3})= 3"

Question 2

"Moles = \\frac{6}{40}=0.15 moles"

"M= \\frac{0.15}{15}=0.01"

"pH=-log(0.01)=2"

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