0.10 M formic acid (HCHO₂) Ka = 1.8 x 104 0.10 M sodium formate (NaCHO₂) 0.10 M acetic acid (HC₂H302) Ka = 1.8 x 10¹5 0.10 M sodium acetate (Na C₂H302) 0.10 M carbonic acid (H₂CO3) Ka = 4.3 x 10-7 0.10 M sodium bicarbonate (NaHCO3) 0.10 M KOH 0.10 M HCI 0.10 M boric acid (H3BO3) Ka = 5.8 x 10-¹0 0.10 M sodium borate (NaH₂B03) 4. Which reagents listed above should be mixed to result in a buffer of about pH 6-8?

0.10 M formic acid (HCHO₂) Ka = 1.8 x 104 0.10 M sodium formate (NaCHO₂) 0.10 M acetic acid (HC₂H302) Ka = 1.8 x 10¹5 0.10 M sodium acetate (Na C₂H302) 0.10 M carbonic acid (H₂CO3) Ka = 4.3 x 10-7 0.10 M sodium bicarbonate (NaHCO3) 0.10 M KOH 0.10 M HCI 0.10 M boric acid (H3BO3) Ka = 5.8 x 10-¹0 0.10 M sodium borate (NaH₂B03) 4. Which reagents listed above should be mixed to result in a buffer of about pH 6-8?

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter19: The Chemistry Of The Main-group Elements

Section: Chapter Questions

Problem 87QRT: Assume that the radius of Earth is 6400 km, the crust is 50. km thick, the density of the crust is...

See similar textbooks

Similar questions

What mass of solid NaOH (97.0% NaOH by mass) is required to prepare 1.00 L of a 10.0% solution of NaOH by mass? The density of the 10.0% solution is 1.109 g/mL.
Assume that the radius of Earth is 6400 km, the crust is 50. km thick, the density of the crust is 3.5 g/cm3, and 25.7% of the crust is silicon by mass. Calculate the total mass of silicon in the crust of Earth.
The present average concentration (mass percent) of magnesium ions in seawater is 0.13%. A chemistry textbook estimates that if 1.00 × 108 tons Mg were taken out of the sea each year, it would take one million years for the Mg concentration to drop to 0.12%. Do sufficient calculations to either verify or refute this statement. Assume that Earth is a sphere with a diameter of 8000 mi, 67% of which is covered by oceans to a depth of 1 mi, and that no Mg is washed back into the oceans at any time.
Part B A student placed 12.5 g of glucose (C¢H12O6) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100. mL mark on the neck of the flask was reached. The flask was then shaken until the solution was uniform. Á 45.0 mL sample of this glucose solution was diluted to 0.500 L. How many grams of glucose are in 100. mL of the final solution? Express your answer to three significant figures and include the appropriate units. • View Available Hint(s) Value Units Submit
100 90 NANO3 80 70 60 CaCl2 50 Pb(NO3)2 40 KCI NaCl 30 20 KCIO3 10 10 20 30 40 50 60 70 80 90 100 Temperature (°C) If the solubility of potassium nitrate at 20 °C is 37 g per 100 g of water, how many grams of the compound will dissolve in 1.0 mL of water? 1) 37 g 2) 3.7 g 3) 0.37 g 4) 0.0037 g O 5) 370 g Solubility (g solute in 100 g H2O) KNO3 ONY K,Cr2O7
An organic compound was found to contain only C, H, and C1. When a 1.50 g sample of the compound was completely combusted in air, 3.52 g of CO2 was formed. In a separate experiment the chlorine in a 1.50 - g sample of the compound was converted to 1.91 g of AgCl. Determine the empirical formula of the compound. Express your answer as a chemical formula. ΑΣΦ
The hardness of water (hardness count) is usually expressed in parts per million (by mass) of CaCO3, which is equivalent to milligrams of CaCO3 per liter of water. What is the molar concentration of Ca2+ ions in a water sample with a hardness count of 175 mg CaCO3/L? Write the answer in scientific notation like this 1.23 x 10^4 M.
Select the compound that is the strongest acid. O Formic acid K, 1.8 x 104 O Hypochlorous acid K, 2.9 x 108 O Phenol K, = 1.3 x 10 10 O Benzoic acid K - 6.5 x 105
4. At 20°C, acetaminophen has a solubility of about 1.5 g/100 mL in water. If you recrystallize 5.00g of crude acetaminophen in 50 mL of water. What is the maximum mass of solid acetaminophen you would expect to recover after cooling to 20°C? 4.25 g 3.5 g 5.75 g 6.5 g
A chemist prepares a solution of vanadium(III) bromide (VBr3) by measuring out 0.10 g of VBr3 into a 100. mL volumetric flask and filling to the mark with distilled water. Calculate the molarity of Br anions in the chemist's solution. Be sure your answer is rounded to 2 significant digits. 0 mol L x10 X
A chemist prepares a solution of magnesium bromide (MgBr₂) by measuring out 45. mg of MgBr₂ into a 100. mL volumetric flask and filling to the mark with distilled water. Calculate the molarity of Br anions in the chemist's solution. Be sure your answer is rounded to 2 significant digits. mol L X
City water supplies are fluoridated by adding sodium fluoride to the water. If you live in a city of 1.20x105 people, and each person consumes 650. L of wateriday, what mass of sodium fluoride must be added to the water supply each year (365 days) to have the required fluoride concentration of 1 kg of fluoride per 1 x10 kg of water? (Sodium fluoride is 45.0 % by mass fluoride and the density of water is 1.00 g/mL.) 257 kg sodium fluoride 112 kg sodium fluoride 332 kg sodium fluoride 63,300 kg sodium fluoride 215 kg sodium fluoride 83.0 kg sodium fluoride

SEE MORE QUESTIONS

Recommended textbooks for you

Chemistry: The Molecular Science

Chemistry

ISBN:

9781285199047

Author:

John W. Moore, Conrad L. Stanitski

Publisher:

Cengage Learning

General Chemistry - Standalone book (MindTap Cour…

Chemistry

ISBN:

9781305580343

Author:

Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell

Publisher:

Cengage Learning

Chemistry by OpenStax (2015-05-04)

Chemistry

ISBN:

9781938168390

Author:

Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Publisher:

OpenStax

Chemistry: The Molecular Science

Chemistry

ISBN:

9781285199047

Author:

John W. Moore, Conrad L. Stanitski

Publisher:

Cengage Learning

General Chemistry - Standalone book (MindTap Cour…

Chemistry

ISBN:

9781305580343

Author:

Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell

Publisher:

Cengage Learning

Chemistry by OpenStax (2015-05-04)

Chemistry

ISBN:

9781938168390

Author:

Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser

Publisher:

OpenStax

SEE MORE TEXTBOOKS