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Questions and Answers
The pH of acids ranges from ______ to 7
0
Acids release ______ ions in water
H+
Substances that donate protons are part of the ______ theory
Bronsted-Lowry
Acids ionize to form ______ ions in aqueous solution
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Calculate for pOH pH + pOH= ______
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Compute for the H+ ion concentration if the pH is 1.75 [H+]= ______
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PKa = − log ______
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PKa = -log (Ka) -log (1.06 x 10______) -log (1.06 x 10______) 2.97 Calculate the Ka of ammonium, which has a pKa = 8.24 pKa = -log (Ka) use the antilog Press shift > log > encode the value (-8.24) 5.75 x 10 ______
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PKb = − log ______
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PH range: is 5.5 - ______ Indication: Antipyretic, Analgesic, Anti-inflammatory Direction to use: PO Precaution: Do not take this medication for fever for more than 3 days unless directed by your doctor.For adults, do not take this product for pain for more than 10 days (5 days in children) unless directed by your doctor.pH range: Approximately 8 Indication: Antacid â—¦ used to treat the symptoms of too much stomach acid such as stomach upset, heartburn, and acid indigestion.Direction for Use: PO, after meals Precaution: If your acid problems persist or worsen after you have used this product for 1 week, seek immediate medical attention.Composed of: Aluminum Hydroxide- causes constipation Magnesium Hydroxide- causes laxative effect Combined to minimize the effect of each other pH range: 1.0 to 2.5 Indication: For vitamin C â—¦ is a popular remedy for the common cold, but research is mixed on whether it helps or prevents the sniffles.Direction for Use: PO, with or without food ANY QUESTIONS?You can find me at: [email protected] facebook.com/ OLFUAntipoloPharmacy/ (8)-661-3023 loc. 106
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Direction for Use: PO, with or without ______ ANY QUESTIONS?You can find me at: [email protected] facebook.com/ OLFUAntipoloPharmacy/ (8)-661-3023 loc. 106
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Indication: For vitamin C â—¦ is a popular remedy for the common cold, but research is mixed on whether it helps or prevents the ______.Direction for Use: PO, with or without food ANY QUESTIONS?You can find me at: [email protected] facebook.com/ OLFUAntipoloPharmacy/ (8)-661-3023 loc. 106
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Theoretical point at which equivalent amounts of each have reacted § End point- Point at which there occurs a sudden change in some property of the reaction mixture (by use of indicators) In Volumetric Analysis the following are the rules for using indicators: 1.SA titrated with SB (vice versa) MO, PP and MR 2.WA titrated with SB: pp 3.WB titrated with SA: MR 4.WA titrated with WB: not possible because no indicator will give sharp end point 5.The appearance of color is more easily detected than disappearance of color.Structure PP MO Acid Base Colorless Red Weak acid Presence of COOH group Pink Orange-yellow Weak base Benzoic acid Colorless Red Weak acid Presence of COOH group Methanol Colorless Yellow pH=7-7.5 Aniline 22 An electric device used to measure hydrogen-ion activity (acidity or alkalinity) in solution.Fundamentally, a pH meter consists of a voltmeter attached to a pH-responsive electrode and a reference (unvarying) electrode.pH is a measure of hydrogen ion concentration, [H+], in an aqueous (water) solution pH = - log [H+] pOH = - log [OH-] At 25 degrees Celsius: pH + pOH = 14 Example: Calculate the pOH of the solution with a pH of 4.5 Solution: pH + pOH= 14 14- pH 14- 4.5 9.5 The hydrogen ion concentration of a solution of HCl is 0.05M.What is the pH and pOH of the solution?Solution: 1.Calculate for pH pH = -log (H+) -log (0.05) 1.30 2.
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Calculate the ______ of the solution with a pH of 4.5
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The appearance of color is more easily detected than disappearance of ______.
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The hydrogen ion concentration of a solution of HCl is 0.05M.What is the ______ and pOH of the solution?
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Study Notes
Acids and Bases
- pH of acids ranges from 0 to 7
- Acids release H+ ions in water
- Substances that donate protons are part of the acid theory
- Acids ionize to form H+ ions in aqueous solution
pH and pOH
- pH + pOH = 14
- pH = -log [H+]
- pOH = -log [OH-]
pKa and Ka
- pKa = -log Ka
- Ka = 1.06 x 10^(-8.24) for ammonium
- pKa = -log (1.06 x 10^(-8.24))
Medications and pH
- pH range: 5.5 - 6.5 (Antipyretic, Analgesic, Anti-inflammatory)
- pH range: approximately 8 (Antacid)
- pH range: 1.0 to 2.5 (Vitamin C)
Titration and Indicators
- Theoretical point at which equivalent amounts of each have reacted is the equivalence point
- End point is the point at which there occurs a sudden change in some property of the reaction mixture (by use of indicators)
- Rules for using indicators in Volumetric Analysis:
- SA titrated with SB (vice versa): MO, PP, and MR
- WA titrated with SB: PP
- WB titrated with SA: MR
- WA titrated with WB: not possible because no indicator will give sharp end point
pH Meter
- An electric device used to measure hydrogen-ion activity (acidity or alkalinity) in solution
- Consists of a voltmeter attached to a pH-responsive electrode and a reference (unvarying) electrode
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Description
Test your knowledge on calculating pH, pOH, and hydrogen ion concentration. This quiz covers the formulas and methods for computing these values, including the use of logarithmic functions and the relationship between pH and pOH. You'll also encounter questions related to pKa and pKb measures for acids and bases.
