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Question - A biochemist has 100 mL of a 0.10 M solution of a weak acid with a pKa of 6.3. She adds 6.0 mL of 1.0 M HCL, which changes the pH to 5.7. What was the pH of the original solution? Solutions manual in Lehninger Biochem textbook says that the answer is pH=6.9. I do not know how you arrive at this answer!
sulfur is used in the production of vulcanized rubber detergents dyes pharmaceuticals insecticides and many other
Problem: Carbon forms two stable oxides, CO and CO2. Lead forms three oxides: yellow PbO, black PbO2 and red Pb3O4.
a steel tank with a volume of 9.583L contains N2 gas under a pressure of 4.972 atm at 31.8C Calculate the number of moles of N2 in the tank.
A close chemical relative of the banned insecticide DDT is methoxychlor (C16H15Cl3O2). Methoxychlor is currently used as a home insecticide. Calculate the mass percent of oxygen in methoxychlor.
What would the molecular diagram look for oxygen bonding with bromine. Which are the bonding and which are the antibonding. When we did it this in class there were 8bonding and 5 anti. using a template.
After adding the CaCl2 the solution turned the water " hard". What effect did this have on the lathering ability od the soap? On the lathering abilitiy of detergent?
How much energy (in kilojoules) is released when 13.4 of steam at 122.5 is condensed to give liquid water at 71.5? The heat of vaporization of liquid water is 40.67 , and the molar heat capacity is 75.3 for the liquid and 33.6 for the vapor
During the extraction of trimyristin from nutmeg, two students were given different samples of nutmeg. They noticed that one sample was very fragrant with the characteristic odor of nutmeg
A snack pack of potato chips holds 28 grams of chips. Based on your data, how much fat is present in a snack pack? In such a bag of chips, there are about 15 grams of carbohydrate and about 1 gram of protein.
determine the number and type of donor atoms in the ligand. Options include: a) 4 N and 2 O, b) 2 N and 2 O, c) 4 N and 4 O, d) 2 N and 4 O
Important information about Redox titration, How do I calculate the moles of iron (ore sample) and how do I calculate the mass percent of iron in the ore from this problem
Calculate the volume of hydrogen bromide that can be prepared by reacting 10.0 grams of phosphorus tribromide with excess water at 21 degrees C abd 735mmHg
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