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A careless student, Will Bobble, misread the label on a bottle of 10 M sodium hydroxide and used it (rather than 1 M NaOH) to dissolve his vanillin. Then he stored the solution and left the lab early to catch a ride home. During the next lab period, he added NaBH4 and finished the experiment. Although his product was a white solid, it melted over a broad temperature range that was much lower than the melting point of vanillyl alcohol. His instructor suggested washing the product with dilute sodium bicarbonate; when he did so, about half of the product dissolved and the remainder melted at 115 degrees C. Explain what happened and write an equation for the reaction.
calculate the values of ?Ho, ?So, and ?Go for the reaction at a pressure of 1 atm and temperature of 298.15 K. C(graphite) + H2O(g) = CO(g) + H2(g)
An unknown amount of water is mixed with 370mL of a 6M solution of NaOH solution. A 75mL sample of the resulting solution is titrated to neutrality with 50.7mL of 6M HCl.
Calculate the pH of the solution when 20.00 mL of 0.10 M CH3CO2H (Ka= 1.76 x 10^-5) has been titrated
The first-order decomposition of phosphene to phosphorus and hydrogen 4PH3(g) → P4(g) + 6H2(g)
Discuss in detail the healthcare applications of chemical reactions. Which chemical reactions would you consider to be of importance to healthcare professionals?
What volume of 3.50M H2S is required to react with excess O2 to produce enough NH3 to fill a cylinder that is 50ft long and has a diameter of 13 ft at a pressure of 450 torr and 20?F?
A 150.0 ml flask contains 0.391 grams of volatile oxide of sulfur. The pressure in the flask is 750mmHg and the temperature is 22 degrees Celsius.
Why does the same amount of liquid when left in a wider and flatter container evaporate quicker than when left in a narrower and deeper container?
How many grams of CaH2 (Molar Mass = 42.1 g/mol)are needed to generate 16.0 L of H2 gas if the pressure of H2 is 729 torr at 21.0°C?
When concentrated sulfuric acid (18.0 M) is added to sodium chloride, hydrogen chloride gas is formed.
Calculate the potential of a galvanic cell with two platinum electrodes, the one immersed in a solution that is .0301 M in \(Fe^{3+}\) and .0760 M
Benzene has a heat of vaporization of 30.72 kJ/mol and a normal boiling point of 80.1 degrees C. At what temperature does benzene boil when the external pressure is 490?
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