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A student performing this lab measured the initial pH of one of his phosphate buffer solutions to be 7.68. After adding 0.25 mL of 0.50 M NaOH, the pH of the same solution changed to 8.05. Calculate the buffer capacity (? mmol OH-/? pH) of this solution to two decimal places.
Your friend decides to decrease cooking time for spaghetti noodles by adding table salt to 2.0 L water. How much table salt (NaCl) must be added to the water in order to raise the boiling point by 4.0?C? (Kf = 1.86?C/m, Kb = 0.512?C/m)
Organic Chemistry and Genetics Problems - Write an equation for the complete hydrolysis of 2'-deoxythymidine-5'-monophosphate (dTMP) to its component parts.
calculate the molarity of acetic acid in a vinegar sample knowing that 5.00 mL of vinegar requires 43.50mL of 0.105M NaoH to just reach the phenolphtalein endpoint in a tritration
Consider a cylindrical container partially filled with ethanol (C2H6O). Using the model in which ethanol vapor pressure is a result of equilibrium between the rate of ethanol evaporation and condensation.
This is a study guide for naming of organic compounds, specifically alkanes and substituted alkanes. Thirty (30) questions and answers are also included. The study guide shows you
Calculated what is the pressure in atm using the van der Waals' equation for Oxygen gas under these conditions? For O 2 , it is given a = 1.360 L2atm/mol2 and b = 3.183E-2 L/mol.
Calculate the mass of oxygen dissolved in a 5.00 L bucket of water exposed to a pressure of 1.13 atm of air. Assume the mole fraction of oxygen in air
The reaction of barium metal with liquid water produces 660.2 kJ of heat for every mole of barium that reacts. One of the products is barium hydroxide.
Buffer solution Problem to determine pH, Determine the pH after the addition of 10.0ml of 0.1M NaOH to 100.00ml of this buffer. An aqueous solution of 100.0ml 0.100M NaCl is titrated with 0.100M AgNO3 (AgCl Ksp= 1.0x10^-10) pAg=-log[Ag+]
The element boron has two naturally occurring isotopes with masses of 10.0129 amu and 11.0093 amu. What is the percent abundance of the second isotope?
Calculate the amount of energy needed in calories to heat 145 g of water from 22.3 degrees celsius to 75.0 degrees celsius. (water in j/g degree celsius = 4.184, cal/ g degree celsius = 1)
A 295mLflask contains pure helium at a pressure of 742torr . A second flask with a volume of 465mL contains pure argon at a pressure of 717torr .
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