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When would you do a hot filtration? Why do you wash your crystals after you collect them by filtration?
Sulfurous acid, H2SO3, is a weak diprotic acid (pKa,1=1.89 and pKa,2=7.21 at 25oC). What is the pH of 0.121 mol/L H2SO3(aq) at 25oC? Give your answer accurate to two decimal places.
Water molecules can undergo a self-ionization reaction to produce very small concentrations of hydronium and hydroxide ions
Which statement(s) is(are) true about X which has a molecular ion peak in its mass spectrum at mass 164?
health risk does each of the following classification represent Corrosive Carcinogen Teratogen Mutagen
Match the detector or detectors that can be used in gas chromatography for the detection of the following list of analytes. (More than one detector may be appropriate for a given analyte, and a given detector may be appropriate for more than one g..
Write a balanced chemical equation for the reaction of chlorine with thiosulfate ion, assuming an acidic solution.
A calorimeter that contains 2500 g of surrounding water is used to measure the heat associated with the reaction of 520 g of a reactant. Calculate the energy, in joules per kilogram of reactant, associated with the reaction
Without using equations can you explain how heat capacity and entropy are related
Draw the structure of the one alkene which upon treatment with O2 followed by Zn and acid, would give rise to formaldehyde and cyclohexanone
A certain sample of gas has a volume of 20.00 dm3 at 0°C and 1.000 atm. A plot of the experimental data of its volume against the Celsius temperature, ?, at constant p, gives a straight line of slope 0.0741 dm3 (°C)?1.
C5H5N, and 0.350 moles/l in pyridinium chloride, C5H5NHCl you are given a kb value of 1.7 x 10^-4 for pyridine find the ph of this solution using this kb value
Using the structure of mathyl orange as an example, draw resonance froms to show how conjugation extends throughout the molecule.
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