PH Determination of Solutions Lab Report Example | Topics and Well Written Essays - 500 words

PH Determination of Solutions - Lab Report Example The pH of the solution in each test tube was then measured using a pH meter and the value was recorded. Thereafter, two to three drops of the universal indicator were added to the solution in each test tube and the resultant color was noted and read against the matching color and pH on the universal indicator chart. A similar procedure was repeated for the basic solutions in four different test tubes labeled 10, 11, 13, and 14. The colors of the solutions and the resultant pH using the pH meter as well as the universal indicator were recorded and comparisons were made. In comparing the pH of various acidic and basic solutions using a pH meter and universal indicator, the color, pH of universal indicator and pH from the ph meter was recorded for each solution. Table 1 below summarizes the observed results for the acidic solutions. It was observed that the pH obtained from the pH chart varied from the pH obtained from the pH meter in most of the solutions. The variations were small in some of the solutions such as1, 3 and 13. On the other hand, the variations in pH were significant in solutions such as 4, 7, 10 and 11. The pH meter value was the same as the universal chart pH in solution 14. The variations in the pH values can be attributed to the challenges in color interpretation when using the pH chart. Some of the resultant colors of solutions did not exactly match the color of the pH chart leading to the discrepancies in the pH values as the closest color was taken. The slight variations in the pH chart values and pH meter values can be attributed to the sensitivity of the pH meter that allows it to quantify small changes in pH between 0.1 and 0.9. The pH chart, conversely, does not allow for the determination of pH values smaller than one