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How many grams of potassium formate, KHCOO, must be added to 500. mL of 0.0700 M solution of formic acid, HCOOH, to produce a buffer solution with a pH of 3.50? Any change in the volume of the solution due to the addition of solid potassium formate is insignificant. (Ka for HCOOH = 1.8 x 10^-4)
Balance the following redox reaction if it occurs in an acidic solution. What are the coefficients in front of H2C204 and H2O in the balanced reaction. MnO4^-(aq)+H2C2O4(aq)--> Mn^2+(aq)+CO2(g)
Explain the difference in the answers to question 2 and question 5. Which is the "correct" value for the concentration of the standard NaOH solution? Why?
An enzyme-catalyzed reaction was carried out in a 0.2M "Tris" buffer, pH 7.8. As a result of the reaction, 0.03 mole/liter of H+ was produced. (pKa of Tris =8.1). What was the ratio of Tris+
A "free" element A monoatomic ion Part of an ionic or covalent compound Part of a polyatomic ion I know that H and O's numbers can change depending on how they are bound to other elements, but usually H is +1. However a more simple way to memorize..
If the reaction of 2.50 g of aluminum with 2.50 g of oxygen produced 3.50 g of aluminum oxide, What is the % yield of the reaction?
How many liters of CO2 are formed at STP by the complete combustion of the propane in a container with a volume of 14.0L and a pressure of 4.5atm at 24?C?
Name the alkene(s) with the molecular formula C6H12 that are unbranched and that show E/Z isomerism.
Ammonia and hydrogen chloride gases react to form solid ammonium chloride. A 10.0 L reaction flask contains ammonia at 0.483 atm and 22°C, and 169 mL of hydrogen chloride gas at 7.50 atm and 271 K is introduced.
why do we assume that the extra electrons in i3- must be placed on the central iodine atom to exceed the octet rule?is
Calcium phosphide reacts with water according to the equation. Using 84.0g of Ca ?P? and 36.0g of H?O, What volume of PH? will be produced at 273 K and a pressure of 1520 torr? Ca?P? + H?O --> Ca(OH)? + PH?
In combustion studies of the use of H2 as an alternative fuel, HO is sometimes formed in flames by the reaction, H(g) + 1/2 O2(g) HO(g) Use the data below to calculate the value of Kc
Under what circumstance is the rate law related directly to the balanced equation for a reaction
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