pH and pOH Q.

Question 1

The pH of a run water 4.82 calculate the hydrogen ion of the water

Answer 1

• To find the hydrogen ion concentration
  [H+] from a given pH, you can use the formula: pH=−log[H+].
• Rearranging this formula to solve for [H+]:[H+]=10−pH.
• Given that the pH is 4.82: [H+]=10−4.82.
• When you calculate 10−4.82, you get approximately: [H+]≈1.51×10−5M.

**Note: Just compute the power of 10 with the exponent −4.82.

Question 2

The OH- of blood sample is 2.5x10-7M. what is the pH of the blood.

Answer 2

• To find the pH when given the hydroxide ion concentration, we first calculate the pOH and then use the relationship: pH+pOH=14(at25°C).
• Step 1: Calculate pOH Given: [OH−]=2.5×10−7M.
• The pOH is calculated by: pOH=−log(2.5×10−7).
• Step 2: Calculate pH, Now, using the relationship: pH=14−pOH=14−6.60=7.40.

Question 3

The concentration of hydrogen ion H+ in a bottle of table wine is 3.2x10-4M. Find the pH of the wine

Answer 3

• To find the pH, use the formula: pH=−log[H+].
• Given that [H+] is 3.2×10−4M, we calculate: pH=−log(3.2×10−4).