Sodium Chloride Lab
In the experiment, we tested a sodium chloride solution. Along with the tested solution, control groups (water and sodium phosphate) were used to be help understand whether or not NaCl was a buffer. Water was the negative control group and sodium phosphate was the positive control group. If NaCl was a buffer than the pH would be stabled as the sodium phosphate buffer. If NaCl was not a buffer than the pH would fluctuate like the negative control, water. During the first trial and prior to the drops of 0.5 M of HCl acid, the pH of sodium chloride was 7.50. After the addition of 5 drops of 0.5 M of HCl, the pH decreased by 4.83 and ended at 2.67 on the pH scale. When comparing the results of the sodium chloride to the control groups, the total pH change of sodium phosphate was only
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Looking at the three data results, sodium chloride acted more like the water. The amount difference between the total pH change between water and sodium chloride was 2.13, while the total pH change between sodium phosphate and sodium chloride was 4.08. Water has a smaller range difference to sodium chloride in comparison to sodium phosphate large range difference. To further test our prediction, we looked at the pH effects of sodium chloride in relations to the addition of 0.5 M of NaOH base. Before adding the base, the pH of NaCl was checked to look at the whether or not the pH would change after the addition of a NaOH. The pH of NaCl prior to adding base was 7.50. After the 5 drops of 0.5 NaOH, the pH increased to 10.90 on the pH scale. The difference in total pH change from the
Looking at the three data results, sodium chloride acted more like the water. The amount difference between the total pH change between water and sodium chloride was 2.13, while the total pH change between sodium phosphate and sodium chloride was 4.08. Water has a smaller range difference to sodium chloride in comparison to sodium phosphate large range difference. To further test our prediction, we looked at the pH effects of sodium chloride in relations to the addition of 0.5 M of NaOH base. Before adding the base, the pH of NaCl was checked to look at the whether or not the pH would change after the addition of a NaOH. The pH of NaCl prior to adding base was 7.50. After the 5 drops of 0.5 NaOH, the pH increased to 10.90 on the pH scale. The difference in total pH change from the