With the use of this technique we placed chlorine, bromine, and iodine into solutions containing chloride, bromide, and iodide. In the reaction the free halogen (X2) oxidizes the other halide ion (Y-) and gets reduced by gaining electron(s). In table 3, chlorine was the strongest oxidizing agent and iodine was the weakest oxidizing agent. Since chlorine was the strongest oxidizing agent it will react more and the weak agent will react less. This explanation can be demonstrated in table 3 also because the results of the reactions demonstrates that chloride reacted more by the color of the product compared to the color of chloride in the mineral oil.
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.
Chemistry chapter 6.3 1) a. Cation b. Electrostatic forces 2) Ionic bond between metal and oxygen, the metals conduct electricity in a solid state using delocalised electrons. They are coated with a special kind of plastic e.g. Copper. 3) When they contain 8 valance electrons. 4) When naming an ionic compound, which ion is given first?
Also, the more stable the free radical that is left behind, the weaker its C-H bond strength will be. The difference between the bromine and chlorine product ratios can be partially explained by the Hammond postulate, which states that species with similar energy levels also have more similar structures and react more quickly and less selectively. In the experiment, five different hydrocarbons were tested to measure the rate of reaction with the addition of bromine. Two trials were done, one with the test tubes containing the hydrocarbons and added bromine sitting directly under a lamp, and another with the test tubes in a closed, dark space. Both trials contained a
What determines the ratio of elements in an ionic compound? (i.e. why are NaCl in a 1:1 ratio but CaCl2 has a 2:1 ratio of elements?) 2. Two ionic compounds often react so that the positive and negative ions change places.
* Identify 2-3 pairs of elements whose atoms will bond covalently. Identify another 2-3 elements whose atoms will form ionic bonds with each other. Use diagrams and notes to illustrate and explain what happens to form each type of bond. * Atoms of group 18 elements (the noble gases) do not form bonds. Why do other atoms bond to each other?
What is the identity of your unknown? Justify your conclusion by comparing the observed molecular weight and pKa values to those for all amino acids that might have been your unknown. B) Examining the effect of ionic strength on the pKa of a weak acid. Restandardize the pH meter with both pH 4 and pH 7 buffers. Why is this necessary?
Lesson written by Carolina Sylvestri Experiment: Reaction Between Ions in Aqueous Solutions The Monster Mash Background: Ionic solids dissolve in water to form aqueous solutions which conduct electricity. These solutions contain both positive and negative ions in such numbers that their net electric charge is zero. In this experiment, you will mix various ionic solutions, two at a time, to determine which combinations form precipitates. Knowing which ions are present makes it possible to deduce which of the possible ion combinations are responsible for the precipitates. From your data table, it will then be possible to generate a solubility table.
A) Hydrogen bonds are strong enough to confer structural stability, for example in DNA. B) Hydrogen bonds are weak enough to be easily broken (weaker than covalent bonds). C) They contribute to the water solubility of many macromolecules. D) All of the above Answer: D Page Ref: Section 5 27) London dispersion forces are attractive forces that arise due to A) infinitesimal dipoles generated by the constant random motion of electrons. B) permanent dipoles of molecules containing covalent bonds between atoms of very different electronegativities.
B) the two atoms sharing electrons are equally electronegative. C) the two atoms sharing electrons are of the same element. D) it is between two atoms that are both very strong electron acceptors. E) the two atoms sharing electrons are different elements. 9) The ionic bond of sodium chloride is formed when A) chlorine gains an electron from sodium.