Choose from 500 different sets of chemistry chapter 3 equations calculations chemical flashcards on quizlet. Stoichiometry formula weight fw sum of the atomic weights for the atoms in a chemical formula so, the formula weight of calcium chloride, cacl2, would be ca. Stoichiometric calculations starting with the mass of substance a you can use the ratio of the coefficients of a and b to calculate the mass of substance b formed if. Dispersion forces or london dispersion forces or induced dipoleinduced dipole interactions dipoledipole forces. In earlier topics, structural formulas were given for a number of molecules such as water, ammonia and methane. For example, the reaction of mercury with oxygen to produce mercuric oxide would be expressed by the equation. Calculating empirical formulas the compound paraaminobenzoic acid you may have seen it listed as paba on your bottle of sunscreen is composed of carbon 61. We will then consider some simple kinds of reactions, including combustion reactions. The formulas are based on the mole ratios of the constituents. To convert moles of element to grams of element, multiply the number of moles by the molar mass of the element.
Describe the relationship between the law of conservation of matter and balancing chemical equations. The molecular model represents one s, four o, and two h. Action of drano alnaoh examples of chemical reactions. Stoichiometry stoichiometric calculations starting with 10.
Lavoisier observed that mass is conserved in a chemical reaction. In a chemical reaction, one or more reactants are transformed into products reactants products. Finding empirical formulas calculating empirical formulas one can calculate the empirical formula from the percent composition. The purpose of a chemical equation is to express this relation in terms of the formulas of the actual reactants and products that define a particular chemical change. The subscript to the right of the symbol of an element tells the number of atoms of that element in one molecule of the compound. With these coefficients, we can write a ratio of any two or more substances in the chemical equation. Chemistry, the central science, 10th edition, pearson education inc.
Chemical equations and stoichiometry chemical equations a chemical equation is a shorthand way of indicating what is going on in a chemical reaction. Chemical equations give a description of a chemical reaction. Writing chemical formula and balancing chemical equations worksheet. The molecular formula of an element or compound only applies to elements or compounds. Peters, mo 2006, prenticehall chemistry, the central science, 10th edition theodore l. This observation is known as the law of conservation of mass. From those examples, it can be seen that a structural formula shows which atoms are bonded to which other atoms in a molecule of the compound.
Making pizza the number of pizzas you can make depends. Chapter 3 calculations with chemical formulas and equations. In this chapter, our instructors discuss chemical formulas and stoichiometry, including how to use ions and atoms to determine molecular formulas. Chapter 3 stoichiometry and calculations with formulas. Types of intermolecular force between neutral molecules. A balanced equation has the same number of atoms of each element on both sides, because matter can neither be created nor destroyed. Calculations with chemical formulas and equations chemistry, the central science, 12th edition theodore l. Calculations with chemical formulas and equations lecture outline 3. Write and balance chemical equations in molecular, total ionic, and net ionic formats. For calculations of molemassvolume relationships in a chemical equation. Chapter 3 calculations related to chemical formulas and equations.
When carrying out calculations based on chemical equations, the coefficients of a balanced chemical equation are very important. Chemical equations are concise representations of chemical reactions. Apply the use of state symbols s, l, g and aq in equations. Balancing chemical equations chemical equations specify how chemical reactions occur the reactants used, the products formed and the amounts of each. The molecular model represents a molecule made up of one s and three o. For example, the formula for methane ch4 indicates that one molecule contains one carbon atom and four hydrogen atoms. To gain some understanding of the quantitative significance of chemical formulas and chemical equations, we next consider atomic and formula weights and the mole concept. Stoichiometry is founded on the law of conservation of mass where the total mass of the reactants equals the total mass of the products leading to the insight that the relations among quantities of reactants and products typically form a ratio of positive integers. Chemical equations chemical reactions are presented in a concise way by chemicalequation example. Calculations with chemical formulas and equations 3. Writing chemical formula and balancing chemical equations. To see the solution to a problem or to return from the solution, click on the number of the problem.
We know the moles of each element and have to find the mass in g. Bursten stoichiometry law of conservation of mass we may lay it down as an. Calculations based on chemical equations chemistry resource. We could do it the long way two molecules of hydrogen gas react with one molecule of. Current topics limiting reactants unlimited an endless sea of possibilities phytoplankton grow prolifically at the surface of the ocean, but this growing ceases when they run out of nutrients. Chemical reaction stoichiometry crs is concerned with the latter. So, the formula weight of calcium chloride, cacl 2, would be.
Calculations with chemical formulas and equations 23 answers below as being reasonable or ones that will require her to go back and work the problems again. In this video, ill continue our general chemistry course by teaching you how to use balanced chemical equations to calculate amounts of reactants and products, how to calculate the amount of. Calculations with chemical formulas and equations author. Learn chemistry chapter 3 equations calculations chemical with free interactive flashcards. Molecular formulas the molecular formula is a multiple. Quizlet flashcards, activities and games help you improve your grades. Chapter 10 chemical calculations involving chemical equations study guide by billycorona includes 26 questions covering vocabulary, terms and more. Molarity dilution problems solution stoichiometry grams, moles, liters volume calculations chemistry duration. Chemical equations pdf balancing and classifying equations pdf balancing equations visual pdf word equations pdf key pdf activity series pdf quantitative relationships in chemical equations pdf ion chart pdf solubility chart pdf real life chemistry pdf article designer catalyst pdf. The chapter begins with an examination of chemical equations and how they are balanced. Stoichiometry is the calculation of relative quantities of reactants and products in chemical reactions. A formula weight is the sum of the atomic weights for the atoms in a chemical formula.
Predict the products of simple combination, decomposition, and combustion reactions. Chemical equations chemical equations represent chemical reactions reactants are on the left of the arrow and the products are on the right of the arrow chemical equations must have the same number of atoms of each element on both sides of the arrow. Calculations with chemical formulas and equations the mole abbreviated mol is a convenient measure of chemical quantities. Calculations with chemical formulas and equations molecular mass and formula mass for molecular compounds. The java applet on the web site constructs chemical equations using as input only the molecular formulas of the species stated as being present in the system. The chemical equation must be balanced by using smallest whole number coefficients. Calculations with chemical formulas and equations john d. Anatomy of a chemical equation reactants appear on the left side of the equation. Derive chemical equations from narrative descriptions of chemical reactions. Chapter 3 calculations related to chemical formulas and. Based on the law of conservation of mass antoine lavoisier, 1789 we may lay it down as an incontestable axiom that, in all the operations of art and nature, nothing is created. Calculations with chemical formulas and equations stoichiometry law of conservation of mass the area of study that examines the quantities of substances consumed and produced in chemical reactions is called stoichiometry. The coefficient in front of a formula represents the number of moles, atoms, ions or molecules, of the reactant or product.