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In this experiment we reduced methylene blue with ascorbic acid using HCl as a catalyst. Given that the half reaction for the reduction of methylene blue is MB+(ox) +2H +2e -----> MBH2(red) (potential = 100 mV). Explain whether or not dissolved oxygen in the reactants has an affect on the reaction. Write all half reactions involved.
sample of an unknown was dissolved in 10.7 g acetic acid. If the freezing point depression of the solution was 4.14°C, find the molar mass of the unknown
Cyanogen is a gas which contains 46.2 % C and 53.8 % N by mass. At a temperature of 25oC and a pressure of 750 mmHg, 1.50 g of cyanogen occupies 0.714 L.
Write a net ionic equation for the reaction between aqueous solutions of perchloric acid and rubidium hydroxide.
Calculate the attractive force (in Newtons) between a cation with a valence of +3 and an anion with a valence of -2, the centers
How does the answer for part (a) change if the gas of interest is He? c) What is the largest molecular mass that is capable of escaping Earth's surface at 298 K?
A welder uses 20 gallons of gaseous acctylene (C2H4). What volume of O2 gas measured at the same conditions is consumed Given the following equation
During the saponification of ethyl tetradecanoate, would you expect the product to generate foam/froth when mixed
Balance and complete these reactions. Also write reaction type (combination, decomposition, single replacement, double replacement) a. Cu+ HNO3 ---> b.Cu(NO3)2 + NaOH ---> c. Cu(OH)2 (heat)---> d. CuO +H2SO4---> e. Zn + CuSO4 ---> f. Zn + H2SO4 --..
what products would expect to obtain in the reaction of alpha-naphthaldehyde with KOH? write a detailed reaction mechanism.
a solution of acidic potassium permanganate is added to a solution of iron (II) sulfate Write an unbalanced net ionic equation
What is the approximate percent of complexed iron in a 0.1 M Fe3+ solution containing 1 M KSCN? Kf FeSCN2+ = 1.2*10^2
What is the pH at the point in a titration at which 20ml of 1.0M KOH has been added to 25ml of 1.0M HBr
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