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Explain the laboratory preparation of one Litre of 1.3M formic acid buffer of pH 3.9 from solid sodium formate (molecular weight =68) and formic acid liquid 30% pure (Density of formic acid = 1.029g/ml, pKa = 3.75)
An ionic crystal unit cell is composed of two ions, X and Y. The empirical formula of this solid is XY2. If the X ions occupy the eight lattice points at the corners of the unit cell and on all six faces
calculate each of the following for the reaction that occurs when 56.0ml of 0.50m barium chloride solution are mixed
Given that there are 1.8 x 10^20 moles of diatomic molecules present, how many kilograms of ice (at the North and South Poles) will this quantity of heat melt at 0°C. (The molar heat of fusion of ice is 6.01 kJ/mol.) find in Kg
A physician studying a mutant, hemoglobin, blood protein dissolves 0.0215 grams of this protein in water at 5.0 °C to make 1.50 ml of solution. The osmotic pressure of this solution is 0.00475 atm. What is the molar mass of this protein
What is the percentage purity of your ldh column fraction? 2. How many total mg of ldh are there in your column fraction?
The average pH of normal arterial blood is 7.40. At normal body temperature (37C), Kw = 2.4 * 10^-14.
Arrange the spectrochemical series of VO2+
Describe what will be observed when a mixture of composition x_b=0.8 is heated, at each stage giving the number, composition, and relative amounts of the phases present.
Tungsten trioxide (WO3) has a rich yellow color and is often used as a pigment in ceramics and paints. In order to test a ceramic vase for its WO3 content
A 15.0 mL sample of an acid requires 37.3 mL of 0.303N NaOH for neutralization. Calculate the normality of the acid.
Explain a pressurized tank of helium gas initially at 9bar and 36 C is cooled until the pressure reaches 5bar. Define what is the final temperature of the gas
Question- Calculate the pH for each of the following cases in the titration of 50.0 mL of 0.100 M HClO(aq) with 0.100 M KOH(aq).
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