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A back titration method was employed to find out the concentration of Ca2+ ion in a cell culture medium at pH 10.0 alpha4 = 0.85. In this experiment, 25.00mL of 0.1500 M of EDTA was added to 15.00mL of the unknown Ca2+ solution as well as the EDTA that is in excess was titrated using 0.05000 M of Mg2+. It took 5.40mL of Mg2+ solution to reach the equivalence point. Compute the concentration of Ca2+ ion in the unknown.
Will B-myrcene and allo-ocimene structures not form Diels-alder adducts with maleic anhydride. explain why in each case
1. What is the percent composition of all the elements in the compound ammonium dihydrogen phosphate?
What is the Normality of a solution of KOH if 45.18 mL are required to neutralize 0.3 g pure oxalic acid
The solid and toluene together weigh 58.34 g. The density of toluene at the temperature of the experiment is 0.864 g/mL. What is the density of the solid?
How much heat (in kJ) is needed to convert 866 g of ice at -10 degress celsius to steam at 126 degrees Celsius? (The specific heats of ice and steam are 2.03 and 1.99 J/g x respectively)
A supernatant from a saturated calcium hydroxide solution is titrated with a standardized hydrochloric acid solution to the methyl orange endpoint
A 1.91 L flask at 17degree contains a mixture of Nitrogen , He and Ne at partial prassure 0f 0.261 atm for N2, 0.195 atm for He, and 0.397 for Ne. Calculate the volume in liters at STP occupied by He and Ne if the N2 is removed.
Consider ethanal (acetylaldehyde) which can exist as a pair of tautomers in equilibrium. Calculate the SCF energies of keto and enol forms, convert to Kcal/mole and calculate their relative energy values.
When a 3.00-g sample of KCl is dissolved in water in a calorimeter that has a total heat capacity of 2.472 kJ·K-1, the temperature decreases by 0.280 K. Calculate the molar heat of solution of KCl in kJ/mol
a 2.00 l sample of h2 at 70c and 725mmhg is compressed to 1750ml at 1.20atm what is the new temp?calculate the c
Some water was added to the initial reaction mixture of 5mL water, 5.55g sodium bromide and 5 mL butanol in the procedure that was perfromed to obtain 1-bromobutane from 1-butanol.
The length and width of the settling tanks (two rectangular units are desired with a length to width ratio of 3:1). Assume the average depth of the tank is 4m.
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