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?

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?

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter21: Potentiometry

Section: Chapter Questions

Problem 21.22QAP

See similar textbooks

Similar questions

The pH scale depends on the value of Kw. What would the pH of neutral water be if the Kw was 5.54 x10-15? IMPORTANT: When entering your answer: •Enter the number only (no units) • Do not leave any spaces Use a leading zero before the decimal when necessary Report your number to 3 decimal places (regardless of the significant figures) • Correctly round your answer to the 3rd decimal place (allowed margin of error is only ± 0.001, so always use un- rounded numbers in your calculations) Examples: 0.123 or 9.876
In the determination of the water hardness of a river water sample, the pH of the sample was adjusted to 12 instead of 10. Is there a positive error, negative error, no effect, or error could not be determined In terms of the ppm CaCO3 of sample?
How to write the methodology? I have a practical of the MEASUREMENT USING PH METER, I don't know how to write the methodology. Here is the introduction: A pH meter is an electronic device mainly used for qualitative measurement, for thedetermination of acid and the basic value of a solution. Generally, it measures thehydrogen ion concentration/activity [H+] in a solution. It is denoted as:pH = - log10 [H+]In a pure water solution, the concentration of [H+] and [OH-] ions, respectively, rangefrom 1.0 x 10-1 M to 1.0 x 10-14 M. When [H+] is equal to [OH-] as when pure waterdissociates, the hydrogen ion concentration of pure water is equal to 1.0 x 10-7 M orpH = 7.00, defined as a neutral solution at 25°C, to be of temperaturedependent/endothermic dissociation.[H+] = [OH-] = 1.0 x 10-7 MWhen an ionic or polar substance is dissolved in water, it may change the relativenumbers of H+ and OH-. The higher the pH number, the lower the hydrogen ion concentration, and vice versa. Solution with an…
elp and Mastering :- 799); ple) to NOV 0 6 Q % 어 F5 Part A pH = Study Area A a solution that is 0.13 M in NH3 and 0.17 M in NH4Cl (Kb (NH3) = 1.76 x 10-5) Express your answer to one decimal place. Submit Asession.masteringchemistry.com Provide Feedback 96 IVE ΑΣΦ C F6 MacBook Air Request Answer & ◄ F7 Home | Tro, Chemistry: A... * DII F8 wwww. ? A M Mastering Chemistry: Reci... F9 W F10 I X QM F11 Review | Constants I P + + F12
Pls help Calculate the pH of a solution (aq., 25 oC) prepared by dissolving 23.632 g of solid methylammonium chloride (CH3NH3Cl) in 1.00 L of 1.10 M methylamine (CH3NH2). The Kb for methylamine is 4.40 × 10-4. Report to two decimal places. MM CH3NH3Cl = 67.518 g/mol
A 24 year old graduate student was brought to the ED in a comatose state after being found unconsious in his room. A bottle of secobarbital was there on his bed stand. He did not respond to painful stimuli, his respiration was barely perceptible, and his pulse was weak. Blood gases were drawn and yielded the following results:pH = 7.10pCO2 = 70 mm HgpO2 = 58 mm HgHCO3- = 20 mmol/LO2Hb = 80% (ref range, >95%)1. What is the patients acid-base status?2. What caused the profound hypoventilation?3. Once the respiratory component returns to normal, what will be the patient's expected acid-base status?
If 0-2 pH is considered strongly acidic, 2-7 is weakly acidic, 7.0 is neutral, 7-12 is weakly basic and 12-14 is strongly basic. Then what is seltzer water with a pH of 3.5? If 0-2 pH is considered strongly acidic, 2-7 is weakly acidic, 7.0 is neutral, 7-12 is weakly basic and 12-14 is strongly basic. Then what is drain cleaner with a pH of 13? If 0-2 pH is considered strongly acidic, 2-7 is weakly acidic, 7.0 is neutral, 7-12 is weakly basic and 12-14 is strongly basic. Then what is a hot tub with pH of 7.8?
Consider the spectrophotometric pH measurement of seawater with the indicator thymol blue illustrated at the opening of this chapter. The blue form of the indicator In22 on page 202 has maximum absorbance at a wavelength of 596 nm (nanometers). The yellow form HIn2 has maximum absorbance at 435 nm. Measurements of absorbance at the two wavelengths allows us to find the ratio [In22]/[HIn2]. How would you use this measurement to find the pH?
7-43. Supply the missing data in the table below. Molar Analytical Concentration, c- Acid (Ct = CHa + Ca-) pH (HA] [A^] Lactic 0.120 0.640 Iodic 0.200 0.765 Butanoic 5.00 0.0644 Hypochlorous 0.280 7.00 Nitrous 0.105 0.413 0.587 Hydrogen cyanide Sulfamic 0.145 0.221 0.250 1.20
Calculate the pH of a 0.0469 M KOH solution at T (°C) Kw each temperature. 1.15 x 10-15 5 1.88 × 10-15 10 2.97 × 10-15 15 °C pH = 15 4.57 x 10-15 20 6.88 x 10-15 -14 30 1.46 x 10 35 °С рH %3 35 2.07 x 10-14 -14 40 2.88 x 10 45 3.94 x 10 14 -14 50 5.31 x 10-1- 100 5.43 x 10-13
Xanthurenic acid stock solution Absorbance 25 0.052 50 0.128 75 0.202 100 0.310 150 0.448 200 0.621 Plot a graph, from graph, y=mx (force the trend line to pass through origin since the blank with no xanthurenic acid was set to be zero absorbance) in which, y: Absorbance, x concentration
Complete the data sheet below. DETERMINATION OF pH OF DIFFERENT SOLUTIONS For those who will be using scientific notation, please follow the format below: Example: 0.00455 -> 4.55E-3 45000 -> 4.5E+4 SOLUTION pH [H*), M РОН [он1, м 0.0345 M HCI 0.000890 M Sr(OH)2 Mixture of 10.0 mL each of the 2 solutions above