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What mass (in grams) of solid KCl would need to be added to 500 grams of water to make an ideal solution with a boiling point of 106.8 degrees C? Kb for water is 0.512 degrees C.
A 0.277 g sample of unknown monoprotic acid requires 39.21 mL of 0.1019 M NaOH to reach the endpoint.
We wish to prepare a buffer of pH 10 using common laboratory reagents. How many mL of 6M HCl would we have to add to a solution prepared by adding 100 mL of 15M NH3 to 200 mL of water?
Consider the reaction 2 Al2O3(s) → 4 Al(s) + 3 O2(g). ?H = +3339.6 kJ/mol What is ?H for the formation of one mole of Al2O3(s) from the elements
What is the change in pH when 0.005 moles of HCl is added to 0.100 L of a buffer solution that is 0.100 M in CH3CO2H and 0.100 M NaCH3CO2? The Ka for acetic acid is 1.8 x 10 -5.
A reaction is preformed in aqueous solution, and the temperature of the solution increases by 15.78 degrees celcius. Is the reaction exothermic or endothermic?
A buffer solution with a pH reading of 8.50 was prepared by mixing 0.25 mole acid (HA) and 0.05 mole NaOH in 500.0mL DI water... how much more grams of NaOH
Explain how the acid hydrolysis of starch differs from the enzyme catalyzed hydfolysis. Compare products as well as conditions of time and temperature
Nicotine in cigar smoke (pH is much more readily absorped through the mucous membranes of the mouth than is nicotine in cigarette smoke pH
how many different alkenes will be produced when each of the following substrates is treated with a strong base? a) 1-Chloropentane
Write the formula of all the different carbon dioxide molecules that can be formed from these samples. Which molecule has the largest mass?
calculate the energy required to bring your substance from absoluter 0 to 4000 degrees c , if you have 5g,75g,300g,1000g,1.5 of your substance.
Find out the eq molar concentration of SCN- in the system.( Kc=[FeNCS2+]/[Fe3+][SCN-] =271.5)
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