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We have a solution that contains 0.022 M Ca2+ and 0.014 M Mg2+. We will use potassium hydroxide to selectively precipitate one of the ions, while leaving the other ion in solution. Since Ksp of Mg(OH)2 = 6.3*10^-10 and ksp of Ca(OH)2 = 6.5*10^-6. Mg(OH)2 will precipitate out first. A) what minimum concentration of KOH is needed to begin precipitation of Mg(OH)2? B)What molarity of Mg(OH)2 remains in solution at the point when the second ion begins to precipitate? c) When potassium hydroxide runs out and we have to use potassium carbonate instead. Will potassium carbonate be a good titrant to use for selective precipitation?
Compare your answers with the following: the effective charges on H and Cl in the HCl molecule are +0.178 and -0.178. A. HBr has a smaller dipole moment and a longer bond length than HCl
Why are the crude ester mixtures washed with aqueous NaHCO3?2. You wish to test 9 esters for antitumor activity. One and only one of the 9 esters will actually have antitumor activity. You will prepare the esters from an alcohol and an acid as was..
Determine the Keq for the reaction of benzoic acid with 4-nitroaniline.
draw the mechanism for the reaction between 3-chloroaniline and diethyl ethoxymethylenemalonate.
Octane has a vapor pressure of 40. torr at 45.1 degrees celcius and 400. torr at 104.0 degrees celcius. What is its heat of vaporization (R=8.214 J/K mol)
what is the molar concentrations for those two. The solution volumes are additive. Thank you so much I can't figure this out and I've been looking at it for 2 hours. I need it for my lab report.
Explain how mass effects act to lower the carbonyl frequency, as well as how inductive and hyperconjugation effects act to raise the carbonyl frequency of aldehydes relative to ketones.
How many grams of sodium azide are needed to provide sufficient nitrogen gas to fill a 35.0x35.0x25.0 cm bag to a pressure of 1.20 atm at 26 degress C.
At 1500 degrees C the equilibrium constant for the reaction CO(g)+2H2(g) -->
How many liters of hydrogen gas are collected over water at 20°C and 725 mmHg when 0.75 g lithium reacts with water? Aqueous lithium hydroxide also forms.
How many grams of pure solid PbCl2 could be formed from the reaction of 5.176 g of lead with excess HCl?
The nitrate ion (NO3-) is a very poor nucleophile. In fact, solvents such as water or methanol (also weak nucleophiles) are more reactive nucleophiles than the nitrate ion
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