Question

STR Data Standard solution: NaOH concentration 025M volume of initial NaOH buret reading final NaOhH buret readingG TUTHL volume of NaOH used Concentration of HCI Calculations(Show all work and remember your units and significant figures) Determine the Molarity (concentration) of HCl using the data you collected and the titration formula. (The concentration of the NaOH used was 0.25M) Record your answer on your data form. Questions 1. State the purpose of this experiment The ouredse of thrs expetmeot bn of the phenotphthalein in this experiment. How would this experiment be different if you 2. Describe the had forgotten to add the phenolphthalein? 3. State evidence from the lab that the endpoint was reached solutiom to neutralize S5ml fa base of unlznown concentration Calculate the 4 It akes 7smlofa 2.5M H concentration of an unknown basicsolution. S. If the actual concentration of the HCI was 0.33M what is your percent error? studies usualy involve an analysis of precipitation and its response to pollution. To quantify the degree of contamination in natural rain water or snow, titration is used. The process is quick and results are performed often and in different areas with relatively little effort a. A 1000.0 ml sample of lake water is titrated using 0.100 ml of a 0.100 M base solution. processes do not require expensive or specialized equipment, the test can be What is the molarity of the acid in the lake water? Show all work. b. Based on the molarity of the acid calculated above, what is the pH of the lake water?

Answer 1

4el NaO) O2s 13.8 - O. 2939 N O.21 I 1.89 e acc ebeme Le e ont use

- e S.sr1 m H41 Actual vai 0 s3m С 33-G29 2 33 6-33 H :S