A 300.0 mL buffer solution is 0.220 M in acetic acid
and 0.220 M in sodium acetate.
What is the initial pH of this solution?
What is the pH after addition of 0.0100 mol of HCl?
What is the pH after addition of 0.0100 mol of NaOH?
Please explain I don't understand how to do this. thank you!
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why is the lattice energy of potassium bromide more exothermic than the lattice energy of rubidium iodide in 510 words
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Explain the use of certain calcium compounds in the construction industry as mortar and plaster of paris. Make sure you name the corresponding minerals that these two products are based on
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Explain in detail how coupled enzyme assay works
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Calculate the enthalpy change for:
C2H4 (g) + H2 (g) ---> C6H6 (l)
given the following:
C2H4 (g) + 3O2 (g) ---> 2CO2 (g) + 2H2O(l)
deltaH= -845.2kJ
2H2(g) + O2 (g) ---> 2H2O(l)
deltaH= -573.2kJ
2C2H6(l) + 7O2(g) ---> 2CO2 (g) + 6H2O(l)
deltaH= 1.1987.4kJ
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I cannot figure out this problem, I've made a few attempts at solving it. I could really use some help. The question is : 75.00 mL of 0.225 M HNO2 is titrated to its equivalence point with 0.100 M NaOH. What is the pH at its' equivalence point? Please help!
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a 100ml sample of .20M HF is titrated with .10M KOH. determine Ph of solution after addition of 100ml of KOH.Ka is 3.5x10-4.
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Sketch potential energy curves for the ground and excited states showing events leading to phosphoresce. Use arrows to label all necessary transitions and answer the following:
A) Based on your picture does phosphoresce occur at lower or higher wavelength relative to the absorption wavelength?
B) Would you expect 0-0 transition for absorption and phosphorescence to be coincident?
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Can someone please explain the acid cleavage reaction in detail? I know it's SN2 if its a primary or secondary, and the less hindered carbon is attacked. I know SN1 occurs if a carbon is tertiary, but I don't know how these reactions look. Please help!
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When 24.0 mL of 0.600 M H2SO4 is added to 24.0 mL of 1.20 M KOH in a coffee-cup calorimeter at 23.50°C, the temperature rises to 30.17°C. Calculate H of this reaction per mole of H2SO4 and KOH reacted. (Assume that the total volume is the sum of the individual volumes and that the density and specific heat capacity of the solution are the same as for pure water: d = 1.00 g/mL and c = 4.184 J/g×K.) H per mole of H2SO4 reacted:
___ kJ/mol
H per mole of KOH reacted:
___kJ/mol
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Calculate the percentage composition, by weight, in terms of the constituent oxides of the following minerals. Constituent oxides are SiO2, Al2O3, TiO2, FeO, MgO, Na2O, K2O, CaO, H2O, etc. Also, write a balanced chemical equation for each mineral.
a. Ilmenite {FeTiO3}
b. Muscovite {KAl2(AlSi3O10)(OH)2}
c. Plagioclase feldspar (albite) {NaAlSi3O8}
d. Magnetite {Fe3O4}
e. Olivine {(Mg,Fe)2SiO4 - assume equal proportions of Mg and Fe}
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Calculate the pH in the titration of 20 mL of 0.125 M HCL with 0.250 M NaOH solution after adding 9.60 mL and 10.40 mL of NaOH
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Using Silica or Alumina in packing the column results in “Normal” chromatography. What is reversed-phase chromatography and why is it useful?
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When grape juice is fermented, glucose (C6H12O6) is converted to ethanol (C2H6O) and carbon dioxide. Please show work.
a.) Write a balanced chemical equation for the reaction. (There are not any other reactants or products.)
C6H12O6 -> C2H6O + CO2 is this correct?
b.) How many grams of glucose are needed to form 150 g of ethanol?
c.) If a grape juice sample dontains 4.50 kg of glucose, how manu grams of ethanol can be produced?
d.) How many milligrams of carbon dioxide can be produced from
0.778 g of glucose?
In: Chemistry