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Prepare 100ml of 0.05 M phosphate buffer pH 6.3, utilizing solid NaH2PO4 as well as solid Na2HPO4. Compute the amounts of the two solids needed for this buffer.
volume of 20.0 mL of a 0.190 M HNO3 solution is titrated with 0.550 M KOH. Calculate the volume of KOH required to reach the equivalence point.
When 1.0 g of NaOH is dissolved in this same calorimeter the temperature raises by 1.6 C. Calculate the calorimeter constant and enthalpy of solution for one mole of NaOH.
Compound on TLC can be roughly distinguished into their classes based on the characteristics produced after they are modified by spraying reagent such as iodine vapour. What group of compound can be identified using iodine
1 calculate the masses of cano32 x4h2os and kio3s required tomake 10 g of caio32s. calculate the amount of cano32
Determine the boiling point of a solution that contains 78.8 g of naphthalene (C10H8) dissolved in 722 mL of benzene (d = 0.877 g/mL). Pure benzene has a boiling point of 80.1°C and a boiling point elevation constant of 2.53°C/m.
The mass of the carbon dioxide was 30.50 g, and the mass of the water was 14.98 g. What was the empirical formula of the hydrocarbon
copper ii sulfate dissolve sin water to form a blue solution. what species are present in the solution ie what is
What is the [H3O+] for a buffer solution that is 0.250 M in acid and 0.600 M in the corresponding salt if the weak acid Ka = 5.80 x 10-7? Use as example the following equation of a conjugate acid-base pair
15 g of steam at 373 K is added to 250 g of H2O (liquid) at 298K at onstant pressure of 1 bar. Is the final state of the system steam or liquid water? Calculate changes in entropy for the process.
At 50 degrees C, the value of pKw (the dissociation constant for water) is 13.262. Calculate the pH of water at this temperature.
The specific heat of liquid water is 4.184 J/g x C. Calculate the energy required to heat 10.0 g of water from 26.5 C to 83.7 C.
If after the neutralization, the remaining solution was boiled until only the solid sodium sulfate remained, how many grams of sodium sulfate would be present
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