By using this website, you signify your acceptance of Terms and Conditions and Privacy Policy. [14] Unlike some types of heat packs, such as those dependent upon irreversible chemical reactions, a sodium acetate heat pack can be easily reused by immersing the pack in boiling water for a few minutes, until the crystals are completely dissolved, and allowing the pack to slowly cool to room temperature.[17]. L of 0.50 M CH3CO2H to make E. ksp = [Cu^2+] [OH^-]^2, 39. C. 2.1 10-9 You'll get a detailed solution from a subject matter expert that helps you learn core concepts. What mass of KCl (molar mass = 74.55 g/mol) must be added to 1.0 L of 0.0180 M Pb2+(aq) to initiate precipitation of PbCl2(s)? The pH at the equivalence point is near the pKa of the indicator. Using the chemical formula of the compound and the periodic table of elements, we can add up the atomic weights and calculate molecular weight of the substance. # of Atoms: 3 Note that rounding errors may occur, so always check the results. D. ksp = [Cu^2+]^2 [OH^-] PDF Stoichiometry: Baking Soda and Vinegar Reactions - Stanford University A. C. 3.67 Indicator pKa D. 7.73 A. Gases and Their Properties: The kinetic molecular theory describes the motion of atoms and molecules and explains the properties of gases. E. 1.9 10^3 mol/L, 47. This site explains how to find molar mass. C. 41 g 0.0 g Which one of the following conditions is always true for a titration of a weak acid with a strong base? Any chemical element. What color change is exhibited by phenolphthalein during a titration of aqueous acetic acid with aqueous sodium hydroxide? The answer is 0.00641475125936. You can do the reverse unit conversion from 1.6 104 mile per hour Calculate the mass NaCH3CO2 contained in 500.0 mL of a 0.1500 M NaCH3CO2 solution. 21. B. What mass of solid NaCH3CO2 (molar mass = 82.0 g/mol) should be added to 1.0 L of 0.50 M CH3CO2H to make a buffer with a pH of 7.21? 1 mole is equal to 1 moles NaCH3Co2, or 155.89069 grams. 1. To manufacture anhydrous sodium acetate industrially, the Niacet Process is used. The moles of acid added from the buret equals the initial moles of weak base. It is often used to give potato chips a salt and vinegar flavour, and may be used as a substitute for vinegar itself on potato chips as it doesn't add moisture to the final product. D. PK = PH+LOG (OH^-/H3O^+) moles NaCH3Co2 to grams In chemistry, the formula weight is a quantity computed by multiplying the atomic weight (in atomic mass units) of each element in a chemical formula by the number of atoms of that element present in the formula, then adding all of these products together.
