is the calculated sodium hydroxide concentration higher, lower, or the same as the actual sodium hydroxide concentration in the flask, if the oxalic acid that was weighed was not completely transferred to the volumetric flask? explain your answer. select the best answer.

Abeaker with 2.00×102 ml of an acetic acid buffer with a ph of 5.000 is sitting on a benchtop. the total molarity of acid and conjugate base in this buffer is 0.100 m. a student adds 4.70 ml of a 0.360 m hcl solution to the beaker. how much will the ph change? the pka of acetic acid is 4.740.