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Identify the chemical components and the proportions necessary to achieve a buffer with the desired pH. Include relevant calculations in your answer.
experiment to determine delta H of solution, would you expect to get a larger, smaller or identical temperature change? why?
What is oxidation-reduction reaction. Balance the reaction between potassium permanganate with oxalic acid in the presence of excess sulfuric acid. What is normality. What is the normality of 1M H2SO4 solution.
Question- A 10.0 mL sample of 0.200 M hydrocyanic acid (HCN) is titrated with 0.0998 M NaOH. What is the pH at the equiva- lence point. For hydrocyanic acid, pKa = 9.31.
A solution contains 100.0 g of water,10.0 g NaCl,and 15.0 g methanol. what is the weight(mass) percent of methanol in the solution
The cuvette used had a 1.00 cm sample pathlength. The measured absorbance was 0.180. What was the concentration of hemoglobin in the solution. What would the absorbance of the previous solution be if the pathlength were 1.80 cm
Calculate the concentration of sugar in % (w/v) for a 250mL solution that contains 4.32g of sugar
Calculate the amount of heat needed to convert 96 g of ice at 24 C to water at 28 C. The specific heat capacity of H2O(s) is 2.1 J/(g C).
Question- The phosphate buffer in this lab utilizes the second acidic proton from the triprotic phosphoric acid, H3PO4. The components of the buffer include a weak acid, H2PO4- and its conjugate base HPO4 2-.
The Antoine Equation is often used to calculate the saturation pressure of a pure species at a given temperature. Use the thermodynamic knowledge you have gained to explain what thermodynamic properties the Antoine coefficients represent.
It is estimated that more than 5 billion metric tons of CO2 is added to the atmosphere each year. Assume that CO2 is an Ideal gas at 25 oC and 1 atm.
Explain what volume of 70.0 mM potassium maleate buffer, pH 6.5, would be required to make 0.100 liters of 5.00 mM maleate buffer containing 1.80 M ammonium nitrate
Calculate the molality of a solution prepared by dissolving 112. grams of copper (II) sulfate in 450. mL of water at 25 oC
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