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A gas sample occupies 5.63 liters at 776 torr. Find the volume of the same gas if the pressure is changed to 827 torr.
Cu2+(aq) + Zn(s) → Cu(s) + Zn2+(aq)
50.0 cm3 of 1.00 mol dm–3 copper(II) sulfate solution was placed in a polystyrene cup and its average temperature after three readings was noted to be 25OC and the zinc powder was added . The final temperature was noted to be
91.5 OC. Calulate the heat of the reaction in kJ
Using 1L of 0.8M NH2OH as the titrand and 1M HCl as the titrant, at what titrant volume does the pH reach 7? Estimate two titrant volumes for equivalence with and without hydrolysis.
0.7L and 0.8L
0.75L and 0.8L
0.8L and 0.8L
What are the initial pH values when 1M NaOH (a strong base) and 1M NH3 (a weak base) are each used as the titrand against HCl as the titrant?
NaOH: 14; NH3: 12
NaOH: 13.5; NH3: 12
NaOH: 14; NH3: 11
NaOH: 13.5; NH3: 11
Using 1L of a 0.8M weak base, NH3, as the titrand and 1M HCl as the titrant, what is the approximate equivalence point in titrant volume?
3 points
0.6L
0.7L
0.8L
0.9L
For the polyprotic acids in the list above (H2SO4, H2SeO3, H3BO3), what is the approximate equivalence point (in titrant volume) for the second ionization?
1) 1L
2) 1.5L
3) 2L
4) 2.5L
Using 1M NaOH as the titrant and varying the molarity of 1L of CH3CO2H from 0.25M to 1.5M, how does the equivalence point (in titrant volume) correspond to the titrand molarity?
1) The equivalence point is numerically double the titrand molarity
2) The equivalence point is numerically equal to the titrand molarity
3) There is no relationship between the two
Using 1L of 1M H2SeO3 as titrand and 1M NaOH as titrant, how does hydrolysis impact the neutralization of the second ionization of the polyprotic acid?
1) Hydrolysis accelerates the pH change
2) Hydrolysis slows down the pH change
3) Hydrolysis has no impact
Is vapour pressure an additive property? Or is it not? What kind of a property is vapour pressure
What is the volume of 2.5 moles of N2 gas at S.T.P ?
