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As a chemist for an agricultural products company, you have just developed a new herbicide,"Herbigon," that you think has the potential to kill weeds effectively. A sparingly soluble salt, Herbigon is dissolved in 1 M acetic acid for technical reasons having to do with its production. You have determined that the solubility product Ksp of Herbigon is 8.10×10?6.
Although the formula of this new chemical is a trade secret, it can be revealed that the formula for Herbigon is X-acetate (XCH3COO, where "X" represents the top-secret cation of the salt). It is this cation that kills weeds. Since it is critical to have Herbigon dissolved (it won't kill weeds as a suspension), you are working on adjusting the pH so Herbigon will be soluble at the concentration needed to kill weeds. What pH must the solution have to yield a solution in which the concentration of X+ is 4.50×10?3M ? The pKa of acetic acid is 4.76.
At room temperature (20^circ rm C), milk turns sour in about 63 hours. In a refrigerator at 3^circ rm C, milk can be stored three times as long before it sours. Estimate the activation energy of the reaction that causes the milk to sour.
If 4.10 mol calcium carbide (CaC2) reacts with an excess of water, how many moles of acetylene (C2H2) will be produced?
A rock sample contains traces of 238U, 235U, 232Th, 208Pb, 207Pb, and 206Pb. Careful analysis shows that the ratio of the amount of 238U to 206Pb is 1.164.
An antacid tablet contains 0.1 g of magnesium hydrogencarbonate, Mg(HCO3)2. What mass of stomach acid, HCl, will it neutralise? The reaction between Mg(HCO3)2 and HCl is: Mg(HCO3)2 + 2HCl → MgCl2 + 2CO2 + H2O
What can you say about the realtive magnitudes of the latice energy of lithium iodide and its heat of hydration?
Provide a method for seperating the mixtures of the compounds, dissolved in a solvent diethyl ether. In each case one of the components will be neutral compound. Give your answer in the form of flow chart.
Explain the chemical process that occurred in his muscle cells to cause this discomfort. Explain the chemical reaction that has taken place in the body after exercise.
Using Wien's law, calculate the temperature a star must have for the peak wavelength of its blackbody curve to equal this value.
The normal boiling point of ether is 307.8 K. Calculate the temperature at which its vapor pressure is exactly half of that at its normal boiling point.
The wastewater solution from a factory containing high levels of salts needs to be diluted before it can be released into the environment. Therefore, two containers of waste solution are separated by a semipermeable membrane
What volume will 454 grams (1 lb) of hydroigen occupy at 1.05 atm and 25 C.
Balance the following half-reaction in base, using smallest whole number coefficients. What is the coefficient for OH- in the balanced equation?
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