Explain Why The Concentration Of Hcl Acid Had A Ph Level Of B3

The full strength 1M HCl acid had a pH level of 3.12 (Table 3.1). Sample A2 to A4 remained in the pH 3 level, while sample A5 and A6 had a pH range of 4 (Table 3.1). The pH level for 1M HCl dilutions slightly increased between each sample (Table 3.1). The diluted solutions of 1 M NaOH showed a few unexpected results. The original solution of 1 M NaOH was at a pH level of 11.50 (Table 3.1). However, the pH of sample B2 increased to 12.81 (Table 3.1). The remaining samples had a decreasing pH pattern for each dilution step (Table 3.1). Although the pH of B4 was less than the pH levels of B2 and B3, it was greater than the pH of full strength 1 M NaOH (Table 3.1). The unknown solutions B and F were in a lower pH range of 3.28 and 3.65, while unknown solution A had a slightly higher pH level of 4.78 (Table 3.1). Unknown solutions D, E, and C had an increasing pattern of higher pH levels 10.78, 11.41and 12.71 (Table 3.1)
B5 and B6 diluted solutions of 1 M NaOH are the only tubes that have lower pH levels than the original solution. The B1 10x dilution series yielded abnormal, unexpected results without a consistent pattern as apparent in the pH levels of B2, B3, and B4 diluted solutions. This could be affected by chemicals other than H+ or simple, inconspicuous human errors throughout the procedure. The pH of the diluted solutions did not increase or decrease in integers or a whole pH level, which was different from what my previous