Mar22-10, 07:47 PM
Hello, thanks for reading.
I am solving a lab problem that involves calculating a theoretical pH value, then testing the experimental pH in a lab with tap water that is not the expected pH 7, and comparing the values.
I am determining the theoretical pH value of a 0.1M concentration of NaNO2.
Based on my calculations using the Kb value of 1.96*10-11, the result is pH 8.15.
Then, after completing the test experimentally by creating a 0.1M solution from solid NaNO2 and 0.250L of pH 4.95 tap water, I I recorded an experimental value of pH 6.75.
How do I take into account the pH of the tap water to calculate the proper "theoretical pH value"?
|Register to reply|
|How can i make a graph of velocity vs time taking into account air resistance?||Introductory Physics Homework||11|
|calculating theoretical yield of resulting alum from water dissolving....help asap!||Biology, Chemistry & Other Homework||4|
|Calculating speed in water taking drag force into account||Advanced Physics Homework||1|
|Calculating the theoretical net charge||Biology, Chemistry & Other Homework||1|
|Finding average force with out taking mass into account||Introductory Physics Homework||2|