Please answer the following questions and their parts, using correct number of s
ID: 503539 • Letter: P
Question
Please answer the following questions and their parts, using correct number of significant figures.
1. Measured pH of orange juice: 5.0
a. Determine the concentration of hydronium ions in orange juice.
b. Determine the concentration of hydroxide ions in orange juice. Make sure to use the raw number (Not rounded off) from Question 1-a in order to answer this question, then round off your answer to a correct number of significant figures at the end. Assume that temperature is 25°C.
c. Determine the pOH value of orange juice.
2. Measured pH of milk: 8.0
a. Determine the concentration of hydronium ions in milk.
b. Determine the concentration of hydroxide ions in milk. Make sure to use the raw number (Not rounded off) from Question 2-a in order to answer this question, then round off your answer to a correct number of significant figures at the end. Assume that temperature is 25°C.
c. Determine the pOH value of milk
Explanation / Answer
1)
pH = 5.0
pH = -log [H3O+]
5.0 = -log [H3O+]
concentration of [H3O+] = 1.0 x 10^-5 M
concentration of [OH-] = 1.0 x 10^-9 M
pOH = -log [OH-] = -log (1x10^-9)
pOH = 9.0