The purpose of the lab was to determine which reactant was the limiting reactant, and to see how much of the other reactant was used. The true molarity of a compound can be defined as the amount of moles per liter of that substance. The equation of this single displacement chemical reaction done during this lab is 2Al(s) + 3CuCl(aq) → 3Cu (s) + 2AlCl2 (aq). In the reaction, the solid Aluminum replaces the Copper in Copper (II) Chloride to produce solid copper, and Aluminum Chloride. In order to find which reactant is the limiting reactant, an equation based on the molarity of the Copper (II) Chloride may be used, or the products of the reaction may be observed.
Name___________________________ Period_________________ Chemical Bonds Review Sheet Part one Write the definitions for each of the following terms. Octet rule Cation Anion Ionic compound Monatomic ion Covalent bond Molecular compound Nonpolar covalent bond Polar covalent bond Single bond Double bond Triple bond Part 2 1. Which has a greater potential energy, a noble gas or a metal? Explain your answer. ________________________________________________________________ ________________________________________________________________ ________________________________________________________________ 2.
Test #2 ANSWERS CHM 101 Part I Multiple Choice (2 points each) 1. Which element is most likely to form three covalent bonds? A) C B) Si C) P D) S E) Se 2. A chemical bond formed when two atoms share two pairs of electrons is a ________ bond; it is best described as ________. A) double; covalent B) double; ionic C) single; covalent D) single; ionic E) triple; covalent 3.
The chemical reaction used to find this constant is as follows: MgC2O4 (s) ↔Mg(aq)2++ C2O4 (aq)2- Kc= Mg2+[C2O42-][MgC2O4] Ksp=Mg2+[C2O42-] The solid salt magnesium oxalate is prepared through the following precipitation reaction: Mg(SO4)(aq)+NaC2O4 (aq) → MgC2O4 (s)+NaSO4 (aq) Next, the concentration of the Mg2+ and C2O42- ions is found through a redox titration. This redox titration uses a standardized potassium permanganate solution. The potassium permanganate solution is standardized by titrating it with samples of iron(II)ammonium sulfate hexahydrate . The end point is reached when the solution has turned light purple which is a result of excess amounts of MNO4-. This reaction can be summed up using the following formula: 5Fe2++8H++MnO4- →5Fe3++Mn2++4H2O After standardization, the potassium permanganate solution is then titrated with 3 different magnesium oxalate solutions.
2 marks 4 Draw the structural formula of Compound G. 1 mark 5 Using the chemical shift correlation for 13C NMR, predict the number of peaks for Compound G and draw in the position of the peaks on the blank spectrum below, annotating each peak with its corresponding structure. (2 marks) 6 Draw the structural formula for 2-chloro but-2-ene. Below this draw a structural formula of an isomer of 2-chloro but-2-ene and name this substance.
Empirical Formula WS 1. Write the Empirical Formula for Each of the Following: a. P4O6 b. C6H9 c. CH2OHCH2OH d. BrCl2 e. C6H8O6 f. C10H22 g. Cu2C2O4 h. Hg2F2 2. Write the Empirical Formula for Each of the Following: a. A compound composed of: 72% iron and 27.6% oxygen by mass. b.
c) If the percentage yield is 85.0%, what mass of precipitate is actually produced? d) How many moles of silver ions remain in solution? e) What is the concentration (M) of potassium ions that remain in solution? Problem 2 Ethanol (C2H5OH) reacts with permanganate ions in acidic solution to produce acetic acid and manganese (II) ions. Since this reaction involves a dramatic color change, it can be used in a titration experiment.
Abdul Gadoush Period 2 Chemistry Honors 1-16-14 Metal Gizmo 1. Purpose/Problem: The whole purpose to this experiment was to identify which metal of the following: Copper, Magnesium or zinc had the most occurring reactions in the constant chemicals that they were inserted in. The metal that had the least amount of reactions in each chemical would be the least reactant, and the metal that had the most occurring reactions in the chemical would be the most reactant. For this process to occur (make metal gizmos), Naugatuck Metal Works needs one highly reactive metal and another that isn't a reactive metal. - signs of chemical change = changes the shape and color, creates a gas, distributes heat, Etc.