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The molar concentration of the indicator HIn (Ka= 4.8x10 -6 )and its conjugate base In- at 450 were determined as ?In-= 2.06x104 , respectively. Calculate the absorbanc (b=1.00cm) for the buffered(pH=6.00) having total indicator concentration of 2.00 x 10-5
you will need to construct a calorimeter to complete this project. what are the necessary features of a calorimeters. please answers have to be related to chemistry and specifically to this experiment.
Calculate the maximum concentration of fluoride ion that could be present in hard water. Assume the only anion present that will precipitate is the calcium ion. (CaF2(s) Ksp,25C=4.0x10^-11)
The pH of 0.5 M formic acic, HCOOH, is 2.02. Calculate the difference in pH when 6.42 g of HCOONa is added to 390.9 mL of 0.50 M formic acid. Ignore any changes in volume.
osmium has a density of 22.6 gcm3. what volume would be occupied by a 21.8 g sample of
a solution of sulphide ct10-6m is blended into a 0.4m sodium chloride solution in a closed container. plot a pc-ph
An ideal gas is in a cylinder with a volume of 250.0 mL at a temperature of 25 ºC and a pressure of 700 torr. The gas is expanded to a volume of 1.0 L and the temperature increased to 500 ºC.
a student dissolves two moles of mgno32 into a beaker of water. how many nitrate ions are present in the
A 1.245 gram sample of a compound containing barium and oxygen was dissolved in hydrochloric acid to give a solution of barium ion, which was then completely precipitated out with an excess potassium chromate to give 2.012 grams of barium chromate..
describe the voltaic cell and half cell components and write the shorthand notation for the following oxidation-reduction reactions: a)Mn(s)+Sn^2+(aq)>Mn^2+(aq)+Sn(s) b) Ni(s)+2Ag^+(aq)>Ni^2+(aq)+2Ag(s)
Calculate the ionic strength of (a) 0.0061 M NaOH (b) 0.0005 M La(IO3)3 Assume complete dissociation at this low concentration and no hydrolysis reaction to form LaOH2.
Calculate the mass of KClO3 decomposed. The vapor pressure of water at 28 °C is 28.3 mmHg. (Hint: The gases collected are a mixture of oxygen and water vapor
Gaseous indium dihydride is formed from the elements at elevated temperature: In(g)+H2(g) (reactions goes both ways=double arrow) to InH2(g) with Kp=1.48 at 973 K
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