Lab 1- Chem 106 PDF

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Lab 1: What is Around Us? “Chemistry is Life”...

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Chemistry 10600 Lab 1: What is Around Us? “Chemistry is Life”

Lab 1

List of Elements Metals: Rubidium (Rb), Barium, (Ba ), Zirconium (Zr), Chromium (Cr) Non Metals : Selenium (Se), Iodine (I), Nitrogen (N), Chlorine (Cl)

Table with the 10 Molecular and 10 ionic compounds

Ionic compound

Chemical Name

Rb2Te

RubidiumTelluride

BaI2

Barium Iodide

CrN

Chromium(III) nitride Zirconium(IV) chloride

ZrCl4

CaSe

Calcium selenide

ReI4

Rhenium(IV)Iodide

Rb2(SO4)

Rubidium Sulfate

Tc3N4

Technetium (IV) nitride

ZrSe2

Zirconium(IV)selenide

BaCl2

Barium chloride

Molecular compound

Chemical Name

SeO2

Selenium dioxide

NCl5

Nitrogen Pentachloride

PI

Phosphorus Iodide

SeP4

Selenium phosphide

BrCl3

Bromine trichloride

NS3

Nitrogen trisulfide

SeFl6

Selenium hexafluoride

ICl5

Iodine pentachloride

HI

hydroiodic acid

BrCl3

Bromine trichloride

Focus Questions 1) I know about ionic and covalent compounds. Ionic bonds form between a metal and a nonmetal and they are usually more strongly held together. Ionic bonds don't share electrons; there are electron donor and an electron acceptor. Covalent bonds form between nonmetals and they share electrons. 2) Yes, you need to follow different rules based on what type of compound you want to name. The main two groups are ionic and covalent compounds but even within these groups, there are subgroups that also determine what type of name you want to give your element. For example, if you want to name NaCl versus CO2 you would use different rules because NaCl is an ionic compound and CO2 is a molecular compound. For an ionic compound like NaCl, you would use the name of the cation in the beginning and then add -ide to the stem of the anion. So NaCl would be called sodium chloride. 3) Yes, the way you combine your iconic compound does matter because the cation or the positive ion should go first following the negative ion. 4) Law of Conservation of Mass, the Law of Definite Proportions, and the Law of Multiple Proportions govern the formation of compounds.

Post-lab Question 1a) magnesium and cyanide: Mg(CN)2 1b) chromium (III) oxygen: Cr2O3 1c) Cobalt III sulfate: Co2(SO4)3 2a) Fluorine ions: PtF2, PtF4 2b) hydroxide ions: Pt(OH)2, Pt(OH)4 2c) chromate ions: Pt(K₂CrO₄), Pt(K₂CrO₄)2

3a) Sulfur trioxide 3b) Gallium chloride 3c) lithium phosphate 3d) titanium(IV) oxide 4a) SCl5 4b) NO2 4c) Zn(NO3)2 4d) BaS...