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- A pH probe/meter uses the following equations: Ecell = L + 0.0592 log a1 = L - 0.0592 pH Where L = L1 + EAg/AgCI + Easy= constants L1 = - 0.0592 log a2 a1 = activity of analyte solution a2 = activity of internal solution Questions: How will measured pH value be affected vs “real” pH if the temperature of the sample is 30C when pH was measured? How will measured pH value be affected vs “real” pH if HCl in pH electrode, became 0.15M instead of 0.1M? How pH value will be affected vs “real” pH if the glass of the pH electrode is not fully hydrated? Please answer all questions and provide a brief explanationCalculate the PH of the solution to 2 significant figures 0.021 moldm-3 HCl show all working outsWhat are the steps to yield Only typed solution
- Chemistry Potentiometry Topic Briefly discuss the following: 1.different types of membrane indicator electrode 2.how a pH glass electrode works 3.errors encountered in the use of pH electrode 4.contribution of other variables in the glass indicator potentialFor an insoluble metallic salt, Ksp will always be less than 1. True or False.Please determine how to make a working standard Solution of about 0.010mg/mL. Caffeine will be the active. Diluent will be water.
- List the advantages and disadvantages of a potentiometric titration relative to a direct potentiometricmeasurement.1. 1093-g sample of impure Na2CO3 was analyzed by residual precipitimetry. After adding 50.00 mL of 0.06911 M AgNO3, the sample was back-titrated with 0.05781 M KSCN, requiring 27.36 mL to reach the endpoint. The percentage Na2CO3 (MW = 106.0 g/mole) in the tested sample is ________ % ? Note: Express final answer using least number of significant figures. 2. The alkalinity of natural waters is usually controlled by OH- (MW = 17.01 g/mole), CO3-2 (MW = 60.01 g/mole), and HCO3- (MW = 61.01 g/mole), which may be present singularly or in combination. Titrating a 10.0-mL sample to a phenolphthalein endpoint requires 38.12 mL of a 0.5812 M solution of HCl, and an additional 18.67 mL of the same titrant to reach the methyl orange endpoint. The composition of the sample is _________% CO3-2 and ___________ % OH- Note: Express final answers using least number of significant figures.Discuss the role of indicators for the titration procedure *
- What is/are the principle/s involved on ACIDIMETRIC ASSAY BY DOUBLE INDICATOR TITRATION?Which has an acitivity coeeficient closest to 1 with ionic strength = 0.001 M? a. Lithium ion b. Magnesium ion c. Lead ion d. Aluminum ionFrom the titration of 50.00 mL of FeSO4 0.2500 mol L-1 with a solution of K2Cr2O7 0.1000 mol L-1 under acidic conditions, in which [H+] = 1.00 mol L-1, calculate the Potential (E) of the system for adding the following volumes of K2Cr2O7 solution: i) 5.00 mL ii) volume at the stoichiometric point (PE) iii) 22.00 mL