{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

pH_wksht_2

# pH_wksht_2 - -4 M HI solution pH =-log(9.8 x 10-4 = 3.01 2...

This preview shows pages 1–2. Sign up to view the full content.

pH Worksheet #2 1) Find the pH of a 9.8 x 10 -4 M HI solution. 2) Find the pH of a 2.76 x 10 -4 M NaOH solution. (Hint: this is a basic solution concentration is of OH - ) 3) Find the pH of a solution made by diluting 35 mL of 4.5 M HNO 3 to a final volume of 2.25 L. 4) Find the pH of 4.75 L of an aqueous solution that contains 3.20 grams of HCl and 1.85 grams of nitrous acid. 5) Find the pOH s for the solutions in problems 1 4 above: #1) ___________________________ #2) ___________________________ #3) ___________________________ #4) ___________________________

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Everett Community College does not discriminate on the basis of race, religion, creed, color, national origin, age, sex, marital status, disability, or veteran status. pH Worksheet #2 - Solutions Note : The significant figures in the concentration of [H + ] or [OH - ] is equal to the number of decimal places in the pH or pOH and vice versa. 1) Find the pH of a 9.8 x 10
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: -4 M HI solution. pH = -log (9.8 x 10-4 ) = 3.01 2) Find the pH of a 2.76 x 10-4 M NaOH solution. pOH = -log (2.76 x 10-4 ) = 3.559 pH = 14.000 – 3.559 = 10.441 3) Find the pH of a solution made by diluting 35 mL of 4.5 M HNO 3 to a final volume of 2.25 L. M 1 V 1 = M 2 V 2 M 2 = M 1 V 1 = (4.5 M)(35 mL) = 0.070 M V 2 (2250 mL) pH = -log (0.070) = 1.15 4) Find the pH of 4.75 L of an aqueous solution that contains 3.20 grams of HCl and 1.85 grams of nitrous acid. 3.20 g HCl x 1 mole HCl = 0.0878 mole HCl 36.45 g HCl 1.85 g HNO 2 x 1 mole HNO 2 = 0.0394 mole HNO 2 47 g HNO 2 0.0878 mole HCl + 0.0394 mole HNO 2 = 0.1272 moles acid 0.1272 moles acid = 0.0268 M acid solution 4.75 L H 2 O pH = -log (0.0268) = 1.572 5) Find the pOHs for the solutions in problems 1 – 4 above: #1) pOH = 14.00 – 3.01 = 10.99 #2) pOH = 3.559 #3) pOH = 14.00 – 1.15 = 12.85 #4) pOH = 14.000 – 1.572 = 12.428...
View Full Document

{[ snackBarMessage ]}

### Page1 / 2

pH_wksht_2 - -4 M HI solution pH =-log(9.8 x 10-4 = 3.01 2...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online