Classify each of the following mixtures of aqueous solutions as buffers according to their resulting pH. 10 mL of 0.50 M HF + 10 mL of 0.25 M NaOH 15 mL of 0.10 M CH3COOH + 5.0 mL of H₂O 0.5 L of 0.25 M HCI + 0.8 L of 0.25 M LICN 25 mL of 0.60 M HCIO4 + 45 mL of 0.60 M KF 250 mL of 0.30 M HCI + 100 mL of 0.75 M KNO2 300 mL of 0.50 M HCIO + 400 mL of 0.50 M NaCIO Reset Help Buffer with pH > pKa Buffer with pH = pKa Buffer with pH < pKa Not a Buffer

Classify each of the following mixtures of aqueous solutions as buffers according to their resulting pH. 10 mL of 0.50 M HF + 10 mL of 0.25 M NaOH 15 mL of 0.10 M CH3COOH + 5.0 mL of H₂O 0.5 L of 0.25 M HCI + 0.8 L of 0.25 M LICN 25 mL of 0.60 M HCIO4 + 45 mL of 0.60 M KF 250 mL of 0.30 M HCI + 100 mL of 0.75 M KNO2 300 mL of 0.50 M HCIO + 400 mL of 0.50 M NaCIO Reset Help Buffer with pH > pKa Buffer with pH = pKa Buffer with pH < pKa Not a Buffer

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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yout References Mailings Review View rt Endnote t Footnote ✓ w Notes es 5 Search Researcher Absorbance 5 4.5 4 3.5 2.5 2 1.5 1 0.5 0 Research 0 Insert Citation 1 1. Construct a standard curve in Excel by plotting concentration (in ppm) on your x-ax (unitless) on your y-axis for your known solutions. Label the axes on the graph and provi title. See Figure 5 in the lab handout for an example. Use a linear trendline to generate a data. Label the graph with the equation and the R2 value. Insert your labeled graph in the Help Manage Sources Style: [APA 2 Bibliography Citations & Bibliography Sciwheel Nitrate Standard Curve 3 4 ty=0.8842x-0.8191 R²=0.9509 Q..**. Concentration Insert Caption 5 6 Insert Table of Figure Update Table Cross-reference Captions ww 7 2. Using the equation from your graph, determine the nitrate concentration (in ppm) in each of samples. Text Predictions: On Accessibility: Investigate O Search 8509 FORGE *
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The volume of water needed to dissolve 0.0509 grams of lead fluoride is Assume no volume change upon addition of the solid. Submit Answer Retry Entire Group 7 more group attempts remaining
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Time (sec.) pH of distilled water pH of buffered solution 20 7.99 8.61 40 7.46 8.43 60 7.15 8.31 80 6.75 8.22 100 6.54 8.16 120 6.39 8.10 140 6.22 8.05 160 6.11 8.01 180 6.03 7.97 Conclusion Explain your observations from the data table. Which resists a change in pH the most, water or the buffered solution? Give reasons. When you blow into the water, the pH goes up. Is the solution becoming more basic or acidic? A buffer is usually made of a weak acid and a weak base. When you blow into a buffer the pH doesn’t change. What do you think is happening?
Results and Conclusion First Paragraph: First sentence matches with the first sentence of the Objective First sentence is: to identify the given ammonium salt and to determine determine its equivalent mass via acid-base titration Please calculate Average molar mass, % relative range, error, Identity of Unknown stated Second Paragraph: sources of errors discussed Please please please answer super super fast it's super important
d. Reaction with Mineral Acid Table 4 (data) Sample Soap solution Detergent solution Result of Acidification