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Nitrite is a common food preservative. It can be detected by titrating a nitrite-containing sample with a solution of iodine, which converts nitrite to nitrate.
a) give an overall reaction to describe the process
b) How could you detect the endpoint of this titration?
c) If a sample solution that contains sodium nitrite consumes 1.55mL of a 0.00510 M solution of iodine during a titration, what mass of sodium nitrite is present in the sample?
why is the h-f bond so much stronger than the h-I bond? how might you tell whether or not your toother paste conatied calcium carbonate caco3, or perhaps baking soda with out looking at the label?
given the following bond enthalpy values calculate the enthalpy of formation for gas phase isopropanol c3h7oh at 25
A fixed quantity of gas at 24 C exhibits a pressure of 745 torr and occupies a volume of 4.40 L. Use Boyle's law to calculate the volume the gas will occupy if the pressure is increased to 1.88 atm while the temperature is held constant.
7.41g of O2 are combined with 5.23g NH3 , and the reaction proceeds. What mass of NO is produced?
What is the splitting of the signal in the 1H NMR spectrum for the methyl protons of ethane? What is the splitting of the signal in the 1H NMR spectrum for the methyl protons of 1-bromo-2-methylpropane? Please explain?
An enantiomerically pure acid is treated with racemic mixture of an alcohol having one chiral carbon.
List the order of nucleotides in the DNA strand complementary to the section with the sequence [TTAGACGAC]. (2) How many codons does this represent?
In the Lewis structure of PCl3, how many bonds and how many lone pairs are on the central atom?
If a buffer is made up to be 1.0M in acetic acid and 1.0 M in sodium acetate, predict how much acid will be required to change the pH of 100mL of the buffer by 0.1 pH units.
Hydration of alkynes (via oxymercuration) gives good yields of single compounds only with symmetrical or terminal alkynes. Draw the major organic product(s) formed when hex-2-yne undergoes hydration in the presence of HgSO4 and H2SO4.
Question : Explain and show how you would sythesise the following compounds, starting with benzene or toluene and any necessary acyclic reagents. Assume para is the major product.
Write a balanced equation for the decomposition reaction described, using the smallest possible integer coefficients.
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