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If it is unnecessary to add an indicator to KMnO4 titration because of its intense deep purple color. will the end point of the titration coincide with the stoichiometric point? explain
A 50 ml sample of .5 M HCl is titrated with .5 M NaOH. What is the pH of the solution after 28 ml of NaOH have been added to the acid
Calculate the ratio of HCL molecules in the first excited rotational state to those in the ground state @ 25 C. Assume an equilibrium bond distance of 1.275 angstroms.
draw Lewis Structures for the following FIVE elements.
what is the global pH change incurred after injection of the HCl? What would the pH change be if this same amount of 1.000 M HCl were put into a gallon of pure water?
the stretomycin has an osmotic pressure of 8.72mmHg at 23.6 degrees C, what is the molecular weight of the antibiotic?
Calculate the concentrations of all species in a 1.75 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1 = 1.4× 10-2 and Ka2 = 6.3× 10-8.
A 4.10 g nugget of pure gold absorbed 278 J of heat. What was the final temperature of the gold if the initial temperature was 25.0°C? The specific heat of gold is 0.129 J/(g·°C).
refer to the given equation as 4NH3(g) + 7O2(g) = 4NO2(g) + 6H2O(g) How many moles of ammonia will be required to produce 13.8 mol of water.
The structure of HxWO3 could contain H+ ions or OH- ions. Which do you think is more likely? Why?
Compute the cell potential(E) after the reaction has operated long enough for the [Al3+] to have changed by .60 mol/L. suppose T=25 C
How do the following changes affect the value of the equilibrium constant for a gas-phase exothermic reaction:
At 100oC, the equilibrium constant (Kc) for the reaction COCl2(g) = CO(g) + Cl2(g) has a value of 2.19 x 10-10. Is the following mixture at equilibrium?
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