Determine what approximate ratio of acid and salt is needed
Determine what approximate ratio of acid and salt is needed, to make the pH 8.8 of a boric acid-sodium borate buffer solution , where pKa of borate acid is 9.24
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A random sample of five observations from first population resulted in standard deviation of 12. A random sample of seven observations from second population showed standard deviation of 7. At the .01 significance level, is there more variation in
A sample which is having 1.80-g of the mixture is dissolved in water, and an excess of NaOH is added, forming a precipitate of Al(OH)3. A mixture contains only NaCl and Al2(SO4)3.
What would be the maximum buffer capacity of this buffer at what pH would bmax occur when the pKa for boric acid is 6.10 Assuming that the total bicarbonate buffer concentration in normal blood is about 0.026 mole/liter.
The line passes through points (1, 2) and (4, 1). Determine area of triangle bounded by the line and coordinate axis.
The following sample observations were randomly chosen.
When 3.00 g of propane, C3H8, is burned in a bomb calorimeter whose heat capacity is 32.7 kJ/K, the temperature increases by 4.62 Kelvin's? Propane is used as a home fuel in some areas. Determine the heat of combustion of propane in
At STP a balloon filled with 1.00 mole of helium gas is heated to 298 K at constant pressure. Determine the change in internal energy. Where CHe = 5.20 J/g oC
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