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A) a sodium hydroxide solution is standardized using 0.50g of solid oxalic acid, H2C2O4. Find the molarity of the base if 30.20 mL are required for the titration of phenopthalein endpoint. H2C2O4(s) + NaOH(aq) ---> Na2C2O4(aq) + H2O (l)
B)A. 10.0 mL sample of household ammonia solution requires 33.55 mL of 0.450 M HCl to reach neutralization. Calculate (a) the molar concentration of the ammonia and (b) the mass/ mass percent concentration of ammonia (17.04 g/mol), given a solution density of 0.983 g/mL. HCl + NH3 ---> NH4Cl(aq)
write structural formulas for the following condensed structures and determine the functional group in each compound.
Experimental solid-oxide fuel cells that use butane (C4H10) as the fuel have been reported recently. These cells contain composite metal/metal oxide electrodes and a solid metal oxide electrolyte. Consider the following unbalanced half-reactions:
For the reaction, A(g) + B(g) => AB(g), the rate is 0.579 mol/L.s when the initial concentrations of both A and B are 2.00 mol/L. If the reaction is first order in A and second order in B, what is the rate when the initial concentration of A = 2.3..
Label the anode, cathode and direction of e- flow an write the half reaction equation for each electrode
By how much is the oxidizing power of MnO4-/Mn2 couple decreased if the H concentration is deceased
Explain why it would have been inadvisable to supply hydrogen and sodium in elemental form and why it is not neccessary.
Consider the reaction of sulfur dioxide and water, which is represented by the following equation: 2SO2(g) + 2H2O(g) ® 2H2S(g) + 3O2(g) How many moles of electrons are transferred according to the equation that is written
Discuss what you would observe after elution and visualization of a TLC plate having made the following mistakes in carrying out the anaylsis.
A 25.0 mL sample of 0.20 mol L-1 HNO2(aq) is titrated with 0.20 mol L-1 KOH(aq) at 25oC. What is the pH AT THE Equivalence point?(FOR HNO2,Ka=4.50x10^-4 at 25oC)
What is the definition and units for atomic mass. What is the difference between molecular mass and nominal mass. Which one do we usually use
Its volume is 2.0 x 10^2 mL and its pressure is 750 torr. what is the molar mass?
The Ka of butyric acid, C3H7COOH is 1.5 x 10-5. What is [C3H7COO-] in a 0.397 M solution of C3H7COOH
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