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a) How many mL of each of 0.10 M lactic acid solution and 0.10 M NaOH solution are needed to make 800 mL of a buffer of pH 3.50?
b) If 0.10 g of NaOH were added to the buffer in question 7, above, what would be the new pH?
c) If 0.15 g of HCl were added to the buffer in question 7, above, what would be the new pH?
An enzyme reduces the activation energy of a reaction at the temperature of 25 degree celsius from 55 kjmol-1 to 15kJ mol-1 by changing the route of the reaction.
the micronutrient calcium is often applied in the form of calcium (II) sulfate. Write the equation for the formation of calcium (II) sulfate from calcium (II) oxide and an appropriate acid.
a sample of methane of mass 4.5 g (4.5g(1mol/16.04g)=.2804mol) occupies 12.7 L at 310K. a) Calculate work done when the gas expands isothermally (delta T=0) against a constant external.
A) Calculate the molar solubility of Ni(OH)2 when buffered at pH=8.0 B) Calculate the molar solubility of Ni(OH)2 when buffered at pH=10.0 C)
For the reaction 2A + B --> 2C, if B is initially 4.0M and 2min later is 3.0M, what is the rate of appearance of C?
What is the pH of a sodium acetate solution prepared by adding 0.820 grams of sodium acetate to 100.0 ml of water at 25.0 oC? The Ka at 25.0 oC for acetic acid is 1.8 × 10-5.
If I have 7.0 moles of gas at a pressure of 0.10 atm and at a temperature of 50.1 degrees C in a balloon, what is the volume of the balloon? (Round to one decimal place.)
a solution of 1 ppm Pb2+was prepared and dispensed 1 mL of it using a volumetric transfer pipette, also the same solution was dispensed using a measuring (Mohr) pipette.
Isotope 1 has a mass of 120.9038 amu and a relative abundance of 57.4%, and isotope 2 has a mass of 122.9041 amu. What is the atomic mass of this element?
Determine which H atom transition (ninitial,nfinal) was responsible for the emission of a photon with a frequency of 6.91 x 1014 Hz.
What is the percentage chlorine by mass in the organic compound?" and got an answer of 37.1% Cl, which im pretty sure is right.
Determine how do you find out the new freezing point of a solution if given the formula is Delta T = m x kf x i but how do you find it how does it work?
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