Illustrated Guide to Home Chemistry Experiments

202 DIY Science: Illustrated Guide to Home Chemistry Experiments

dISoALp S :

All of the solutions used in this laboratory can be flushed down the drain with plenty of water.

RQEWEvI UESTIOnS

q 1 : How did the pH change compare in the buffer solution versus water?

q: 2 Calculate the expected pH of the buffer solution. How does the calculated value correspond to the observed value?

TABLE 11-3: Observe the characteristics of a buffer solution—observed data

Acid/base addedBuffer + HClWater + HClBuffer + naOHWater + naOH

A. 0.00 mL ____.___ pH____.___ pH____.___ pH____.___ pH

B. 1.00 mL ____.___ pH____.___ pH____.___ pH____.___ pH

C. 2.00 mL ____.___ pH____.___ pH____.___ pH____.___ pH

D. 3.00 mL ____.___ pH____.___ pH____.___ pH____.___ pH

E. 4.00 mL ____.___ pH____.___ pH____.___ pH____.___ pH

F. 5.00 mL ____.___ pH____.___ pH____.___ pH____.___ pH

G. 6.00 mL ____.___ pH____.___ pH____.___ pH____.___ pH

H. 7.00 mL ____.___ pH____.___ pH____.___ pH____.___ pH

I. 8.00 mL ____.___ pH____.___ pH____.___ pH____.___ pH

J. 9.00 mL ____.___ pH____.___ pH____.___ pH____.___ pH

K. 10.00 mL ____.___ pH____.___ pH____.___ pH____.___ pH