blorauoH 10 viibib A1. Add about 25 ml of tap water to an Erlenmeyer flask.Next add one drop of phenolphthalein. Observed color in (neutral) waterAdd 4 drops of 0.1 M NaOH solutionAdd 8 drops of 0.1 M HCl solutionObserved colorObserved color

Add about 25 ml of tap water to an Erlenmeyer flask Add one drop of phenolphthalein. Observe color…

Answered: blorauoH 10 viibib A 1. Add about 25 ml…

Chemistry

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Chapter1: Chemical Foundations

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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Timer Notes Evaluate Feedback Consider the titration of 100.0 mL of 0.8 M H₂A by 0.8 M KOH for the next three questions. The triprotic acid has Ka: 1.0 x 10-5, Kaz= 1.0 x 108, and an unknown value for Ka 1) Calculate the pH after 100.0 mL of KOH has been added. pH= Submit Answer Tries 0/45 2) Calculate the pH after 150.0 mL of KOH has been added. pH = Submit Answer Tries 0/45 3) The pH of the solution after 200.0 mL of KOH has been added is 10.00. Determine the value of Kay for this triprotic acid. Use scientific notation to enter this answer, e.g. 1.0 x 1031.00-3. Kay= Submit Answer Tries 0/45
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Acids and Bases Chapter 17 Non-Algorithmic Question 21 Part A You wish to prepare an HC2H3O2 buffer with a pH of 5.14. If the pKa of is 4.74, what ratio of C2H3O2 /HC2H3O2 must you use? O 0.40 O 6.0 O 2.51 O 0.40 O 0.10
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SIMULATION pH of Buffer Solutions [NH4+] = 0.10 M [NH3] = = 1.00 M H3BO3/H₂BO3 H₂CO3 / HCO3- HOCI / OCI- Check + NHÀ /NH3 HCO₂H/HCO₂ O HCO3- / CO3²- = 10.25 pH pk = 9.25 K₂ = 5.6 × 10-10 Which of the following best describes the control of buffer pH? A buffer's pH is near the weak acid's pk and shifts with changes in the [base] or [acid]. The pH of a buffer depends only on the relative concentrations of the weak acid and weak base present. The pH of a buffer depends only on the pk of the weak acid. Next> (7 of 7)
Name: Postlab Questions: 1. A student was performing the test for chloride in his unknown. When he added the five drops of HNO3, he observed bubbles forming (effervescence) in his unknown. Was chloride present in his unknown? How do you know? 2. A student added barium chloride to her unknown and immediately witnessed the formation of a precipitate. She concluded that this white precipitate indicated the presence of chloride ion in her unknown. Is she correct? How do you know? 3. A student has two unlabeled bottles of solution. One contains PO4³¯ and the other SO,?". How can this student identify which is which? Page 6 of 6
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find Ka for acetic acid from following half equivalence data point of half equivalence : 5 mLhalf equivalence pH value: 0.88concentration of NaOH: 0.99/ mol L-1 Volume of NaOH at equivalence point: 10mLVolume of acetic acid/mL: 40 mL
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blorauoH 10 viibib A 1. Add about 25 ml of tap water to an Erlenmeyer flask. Next add one drop of phenolphthalein. Observed color in (neutral) water Add 4 drops of 0.1 M NaOH solution Add 8 drops of 0.1 M HCl solution Observed color Observed color