Answered: Calculate the pH of the 0.30 M NH3/…

Calculate the pH of the 0.30 M NH3/ 0.36 M NH4Cl buffer system. What is the pH after addition of 20 mL of 0.050 M NaOH to 1L of solution

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

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

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For humans to maintain the pH of their blood close to 7.4, the body uses three buffer systems: carbonate, phosphate and proteins. If the pH of the blood goes below 6.8 or above 7.8, death may result. Imagine you want to want to make a phosphate buffer in the lab that resembles the bloods phosphate buffer. You start by mixing 0.40 M NaH2PO4 and 0.60 M Na2HPO4. H2PO4- + H2O ⇌ HPO42- + H+ pKa= 7.21 From the reaction above indicate the weak acid and the conjugate base involved in making this buffer. Calculate the pH of the phosphate buffer solution? Provide your answer to 2 decimal places If the pH calculated in b was the blood pH of an actual patient, would you say this patient’s blood pH is within normal range or are they suffering from alkalosis or acidosis?
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928 O Acids and Bases Calculating the composition of a buffer of a given pH A chemistry graduate student given 250. mL of a 1.70M nitrous acid (HNO₂) solution. Nitrous acid is a weak acid with K-4.5 x 10 What mass of NaNO, should the student dissolve in the HNO, solution to turn it into a buffer with pH = 3.10? You may assume that the volume of the solution doesn't change when the NaNO, is dissolved in it. Be sure your answer has a unit symbol, and round it to 2 significant digits. Explanation Check X 15 Reading schedule S tv Lara V 9 da Ad 19.6 Reduction Po zoom Aa
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A student needs to prepare a buffer solution with a pH of 4.54. Assuming a pKg of 4.58, how many ml of 0.1 M NAOH would need to be added to 20.0 mL of 0.1 M HB to prepare this buffer? Please include a proper (abbreviated) unit. HINT : Use pH = pK, + log ([B minus]/[HB]) or, if concentrations are the same, pH = pk, + log (Volume of OH minus/ (Volume of HB minus Volume of OH minus)
For humans to maintain the pH of their blood close to 7.4, the body uses three buffer systems: carbonate, phosphate and proteins. If the pH of the blood goes below 6.8 or above 7.8, death may result. Imagine you want to make a phosphate buffer in the lab that resembles the bloods phosphate buffer. You start by mixing 1.0 M NaH2PO4 and 0.50 M Na2HPO4. H2PO4- + H2O ⇌ HPO42- + H+ pKa= 7.21 From the reaction above indicate the weak acid and the conjugate base involved in making this buffer. Calculate the pH of the phosphate buffer solution. Provide your answer with 2 decimal places. If the pH calculated in b. was the blood pH of an actual patient, would you say this patient’s blood pH is in the normal range or are they suffering from alkalosis or acidosis?
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A buffer solution contains 0.316 M CH3NH3 C1 and 0.315 M CH3NH2 (methylamine). Determine the pH change when 0.069 mol HBr is added to 1.00 L of the buffer. (Assume Kb (CH3NH2) = 4.2 × 10-4.) pH after addition - pH before addition = pH change
A buffer solution is prepared by dissolving 1.000 g of sodium acetate (CH3COONa) into 100.00 of a 0.100 M solution of acetic acid. Then 3.00 1.00 M solution of sodium hydroxide is added to the acetic acid/sodium acetate buffer solution. What is the pH of the solution after adding NaOH ? 4 significant dig
Buffer Intensity?
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Acetic acid has a Ka of 1.8 x 10¬º. Three acetic acid/acetate buffer solutions, A, B, and C, were made using varying concentrations: A. [acetic acid] ten times greater than [acetate], B. [acetate] ten times greater than [acetic acid], and C. [acetate] = [acetic acid]. Match each buffer to the expected pH. Drag the appropriate items to their respective bins. • View Available Hint(s) Reset Help [acetate] ten times greater than [acetic acid] [acetate] = [acetic acid] [acetic acid] ten times greater than [acetate] pH = 3.74 pH = 4.74 pH = 5.74