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An acid with a Ka of 1 x 10-8 is titrated with NaOH, both solutions being 0.020 M. What should the Ka of the indicator be, in order to obtain the best end point?
When compared with the boiling points of other compounds of comparable molecular weight, which of the following is true of the boiling points of carboxylic acids
how many moles of NH4Cl are necessary to prevent the precipitation of magnesium hydroxide (neglect change in volume due to addition of NH4Cl)? The solubility product for Mg(OH)2 is 1.5× 10-11, and the Kb for ammonia is 1.8 × 10-5.
What is the initial concentration (in M) when 19 mL of a iron(III) chloride solution was diluted with 18.5 mL of solvent to a final concentration of 0.576 M? Assume the volumes are additive.
In the nitration of methyl benzoate, why do you wash the crystals with water followed by an ice-cold methanol washing? What is the purpose of pouring the reaction mixture over ice?
List the different strengthening mechanisms and identify the ones that would not apply to pure elemental materials
Would there be any moisture diffusion in this system? In which direction? Using your sorption isotherm estimate the final moisture contents and water activities of each component?
he sample required 5.5 mL of 0.0019 M NaOH to titrate the sample to neutrality. What was the pH of the gastric juice?
Calculate delta E, delta S, delta G, Q and W for the melting of 1.00 mole of ice to for liquid water at 0 degree celcius and 1.00 atm pressure. The standard molar enthalpy of fusion of ice is 6.01 kJ/mol. The desities of ice and liquid water at 0 ..
a) What is the structure of biacetyl? b) Indicate the hybridization of each carbon atom. c) How many pi bonds are present? d) Do the four carbon atoms lie in a plane or do they lie in a straight line?
using henderson hasselbalch calculate the ph of .5 L of 2.0M solution of nitrous acid, HNO2 that also contains 140g of nano2 (MM=70g/mol)
The thermal decomposition of phosphine (PH3) into phosphorus and molecular hydrogen is a 1st order reaction 4PH3(g)--- P4(g)+6 H2(g) The half life of the reaction is 35.0 s at 680C calculate a)
Put the following acids in the order of increasing acidity and please explain reasoning CCl3COOH, CH3COOH, CF3COOH
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