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Explain when measuring pH during a titration. We have a buret containing NaOH (aq) of known concentration. Explain under the buret we have a beaker containing HCl (aq) of unknown concentration. Explain with a pH meter in the beaker that reads 1.30.In which direction do you wait for the pH to change as NaOH is added to the HCl solution?
A) The pH will increase
B) The pH will decrease.
C) The pH will stay the same.
sodium phosphate is mixed with 400.0ml of 0.255M barium chloride. What is the mass of the solid produced?
how many moles of ethylene glycol should be added to the radiator to lower the freezing point of the water from 0 degrees celcius to -18 degrees celcius?
Chemists have discovered nearly 300 different anthocyanins. Finish drawing a resonance contributor in Box 3 that shows positive charge on one of the other oxygens in this anthocyanin. It is not necessary to draw any electron flow arrows in your re..
use a sketch to show the change that occurs as a sulfur atombecomes a sulfide ion. describe how the distance from the
For the reaction PCl5 ->
Provide a structure for the following compound: EI mass spectrum: two molecular ions of about equal intensity at m/z = 180 and 182; IR: 1740 cm-1; 1H NMR
Bearing in mind the Jahn-Teller theorem, rank the following compounds in terms of their degree of deviation from idealized octahedral structure: [Cr(CN)6]4-, [Cu(H2O)6]2+, and [Cr(OH2)6]3+. Explain your reasoning.
A reagent bottle is labeled 0.388M Na2SO4. assuming no volume change, how many grams of Na2SO4 (MM=142.05g/mol) needs to be added to 1.50L solution to obtain 0.750M solution of Na2SO4?
A mineral of a certain metal is a binary compound with sulfur. Analysis shows that a 181.5 g sample of the mineral contains 109.1g of metal. Calculate the mass percent of sulfur in the mineral.
Find the expression for the reversible pressure-volume work of an isothermal van der Waals gas with a constant number of moles (integrate the expression fully from Vi to Vf)
captain kirk of the starship enterprise, has been told by his superiors that only a chemist can be trusted with the combination to the safe containing the dilithium crystals that power the ship.
what is the relative probability (pB/pA) that the protein wil be in state B vs state A?
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