This paper circulates around the core theme of Based on HH equation, I used 40mL 0.15M dibasic phosphate solution together with its essential aspects. It has been reviewed and purchased by the majority of students thus, this paper is rated 4.8 out of 5 points by the students. In addition to this, the price of this paper commences from £ 99. To get this paper written from the scratch, order this assignment now. 100% confidential, 100% plagiarism-free.
Question
Lab question: Based on HH equation, I used 40mL 0.15M dibasic phosphate solution and 60mL 0.15M monobasic phosphate solution to prepare targeted pH 6.7 buffer. But when I used pH meter to measure the pH of my buffer, pH was 6.51. I was confused about the difference. One reason I think is that when I prepared the stock solution: dibasic phosphate solution, I overshot water, so that the solution was diluted. Another reason may be the temperature? Because the room temperature was lower than the standard temperature(25degree I guess), the reaction favors reagent(monobasic phospate), the buffer had a lower pH than targeted? Is there any other reason accounted for that?