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Describe how 100 mL of 0.01 M KIO3 primary standard can be prepared from solid potassium iodate. Write a step-by-step procedure that includes supporting calculations and any equipment/glassware that is required. Keep in mind that the concentration of a primary standard must be accurately known, which could influence your preparation technique and choice of glassware
converting liquid water to solid ice releases 1.44 kcal/mol.
A rubber balloon was inflated with helium gas and floated in the air. The next day, the balloon was somewhat smaller and no longer floated.
Tuning proton affinity. The pKa of an acid depends part,y on its environment. Predict the effect of each of the following environmental changes on the pKa of a glutamic acid side change.
a 4.50-g sample of CaO is reacted with 4.34 g of H2O. how many grams of water remains after completion of reaction?
explain the probable effect of this procedural change on the experimental results?
the resulting acid dichloride is reacted with 20mL butyl amine (density=0.74 g/mL). After work up and recrystallization, 12.5 g of N,N'-dibutyl adipamide is obtained. What is the limiting reagent and percent yield
The standard free energy change for the reaction of nitrogen gas with hydrogen gas to produce ammonia is -32.9 kJ. Calculate the equilibrium constant for this reaction at 25°C.
Calculate the pressure of oxygen for a system in equilibrium in which [NH4+] = [NO3-] at pH 7.00
This solution freezes at -0.159C calculate the degree of dissociation( the fraction of molecules dissociated) for the acid in this solution ( assume the mean ionic activity coefficient has a value of 1). c) from the dgree of dissociation determine..
Consider the unbalanced equation: C5H12(l) +O2(g) --> CO2(g) +H2O(l) if 25.2 grams of pentane (C5H12) are burned in excess oxygen, how many grams of H2O will be produced?
Calculate the heat released when 2.58 L of Cl2(g) with a density of 1.88 g/L reacts with an excess of sodium metal at 25°C and 1 atm to form sodium chloride.
A sample of gas with an initial volume of 32.5 L at a pressure of 760 mmHg and a temperature of 315 K is compressed to a volume of 16.3 L and warmed to a temperature of 435 K
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