Chemistry 1310 - Exam #1

Chemistry 1310 - Exam #1: ❖ Learning Module 1: Chapters 1-3 You should be able to: • • • • • • • • • • • • • • • • • • • • • • • • • • Write, recognize and the symbols associated with the metric system. Convert from one metric unit to another using dimensional analysis. Convert metric to English and English to metric units using dimensional analysis. Distinguish between a trailing zero and a place holder zero. Report answer to proper significant figures after mathematical operation (i.e., addition, subtraction, multiplication & division). Write a number using scientific notation. Define, differentiate the categories of matter. Distinguish between intensive and extensive physical properties of matter. Define density as a concept and be able to manipulate its formula when problem-solving. Define the subatomic particles associated with an atom. Summarize the main postulates of Dalton’s Atomic Theory. State the points where Dalton Atomic Theory faulters according to our knowledge of the atom. Write and interpret an element’s isotopic symbol (elemental symbol, mass number, atomic number) Be able to summaries the attributes of the various models of the atom (i.e., Dalton, Thomson, Rutherford). Define an isotope. Distinguish between the terms: o Atomic mass o Mass number o Atomic number Compute the amu of an element given the amu & percentages of each of the element’s isotope. Differentiate between a cation and an anion. Identify the general areas of the periodic table (i.e., family & groups – metal, non-metal & metalloid Distinguish between ionic and molecular compounds (i.e., ionic compounds: ionic bonds; molecular compounds: covalent bonds & metallic compounds (alloys): metallic bonds). Define the concept of the mole. Convert from mass to mole to units (atoms or molecules) using dimensional analysis. Covert units (compounds or atoms) to mole to mass using dimensional analysis. Compute the molecular mass of a chemical compound from its chemical formula. Distinguish between molecular formula, empirical formula, and structural formula Compute the percent composition of an element if given the chemical formula of the compound. • • Formula writing: if given a metal and nonmetal be able to write its chemical formula • • Define wave duality. Calculate energy if given frequency () and/or the wavelength () or vice versa. o E= h and  = c/ o Know how to manipulate formula ▪ Remember the E= h is about a photon. Quantum Number o What do the four quantum numbers represent? o Recognize the orbital mathematical probability plots (i.e., their shape) Know the areas of the periodic table: o Areas: metal, non-metal & metalloid o Family/Groups: Example: halogens, transition metals, etc. • • Nomenclature: o Be able to name compounds formed from a metal + nonmetal or two nonmetals if given the formula o Be able to write the chemical formula of an ionic compound or molecular formula if given the name. • • • Solve problems using the relationship M x V = moles o M is molarity (mol solute/L of solution) o L is volume in L o mole = (sample mass/mol.mass) Solve dilutions problems using the relationship C1V1 = C2V2 o C1 is the original concentration o V1 is the amount of the original concentration used o C2 is the new concentration for the diluted solution o V2 is the new volume of the diluted solution Understand what a 1:5 dilution says o The new concentration is 1/5 of the original. ▪ Ex: 0.20 M original; new concentration is 0.040M o The new volume is 5X greater than the original ▪ Ex: Original is 10.0 mL; the new volume is 50.0 mL Conversions to Know: • 1 inch = 2.54 cm • 1cm3 = 1 mL = 1 cc You will be given English to metric conversions and English to English unit conversions.