Chemical Reactions Lab 9 Report

Purpose:identify reactants and products in chemical reactionsidentify signs of chemical reactionswrite balanced chemical equationsclassify chemical reactionsIntroduction:A chemical reaction is a chemical change, in which the reactants or starting materials change their identities to form new things called products.Most chemical reactions display visual signs. We use these common signs to determine whether a chemical reaction has happened: color change; fire/smoke; formation of a new solid; formation of precipitate (a clear substance turns cloudy); gas formation/fizzingIn a balanced chemical equation:the formulas of reactants are written on the left side of an arrow, and the products are written on the right side of the arrow. coefficients are used to make sure the number of atoms in reactants are equal to the number of atoms in products. Example: In the fuel cell reaction, when hydrogen gas burns in air, it combines with oxygen gas in air to form water. Write a balanced chemical equation. 2 H2 + O2 -> 2 H2O (the number 2 in front of H2 and H2O are coefficients)There are different methods to classify chemical reactions. You are going to practice the following types in this lab:combination reaction (or: synthesis reaction): two or more reactants form a single productdecomposition reaction: a single reactant forms two or more productssingle displacement reaction (or: single replacement reaction): an element + a compound -> another element + another compounddouble displacement reaction (or: double replacement reaction): compound A + compound B -> compound C + compound Dcombustion reaction: an element or compound burns in air, oxygen gas is a reactant, heat and light are producedProcedure:Watch the following video, record names and formulas of reactants and products, record signs of chemical change in each reaction, write balanced equations, and identify the type of each reaction. Chemical Reactions (Links to an external site.)Lab ReportChemical Reactions1. Reaction of aluminum and iodineReactant(s): write name and formula of all reactants below(0.8 pt)Product(s):write name and formula of all products below(0.8 pt)Observations (any color change during reaction?Smoke/fire? New solid formed? Gas formed? Turned cloudy?) (0.8 pt)Write balanced chemical equation below: (0.5 pt) __________________________________________________________________What type of reaction is it? ___________________________________________ (0.5 pt)2. Reaction of hydrogen peroxideReactant(s): write name and formula of all reactants below(0.8 pt)Product(s): write name and formula of all products below(0.8 pt)Observations (any color change during reaction? Smoke/fire? New solid formed? Gas formed? Turned cloudy?) (0.8 pt)Write balanced chemical equation below: (0.5 pt) ___________________________________________________________________What type of reaction is it? ___________________________________________ (0.5 pt)3. Reaction of methane in airReactant(s): write name and formula of all reactants below(0.8 pt)Product(s): write name and formula of all products below(0.8 pt)Observations (any color change during reaction? Smoke/fire? New solid formed? Gas formed? Turned cloudy?) (0.8 pt)Write balanced chemical equation below: (0.5 pt) __________________________________________________________________ What type of reaction is it? ___________________________________________ (0.5 pt)4. Reaction of copper and silver nitrateReactant(s): write name and formula of all reactants below(0.8 pt)Product(s): write name and formula of all products below(0.8 pt)Observations (any color change during reaction? Smoke/fire? New solid formed? Gas formed? Turned cloudy?) (0.8 pt) Write balanced chemical equation below: (0.5 pt) __________________________________________________________________ What type of reaction is it? ___________________________________________ (0.5 pt)5. Reaction of potassium iodide and lead (II) nitrateReactant(s): write name and formula of all reactants below(0.8 pt)Product(s): write name and formula of all products below(0.8 pt)Observations (any color change during reaction? Smoke/fire? New solid formed? Gas formed? Turned cloudy?) (0.8 pt)Write balanced chemical equation below: (0.5 pt) ___________________________________________________________________What type of reaction is it? ___________________________________________ (0.5 pt)Post-lab Questions: answers to Q. 1 a) & 2 a) can be found online, Q. 3 can be found in lecture notes or textbook.1. In the video it mentions the “airbag chemical reaction” in cars,a) write a balanced chemical equation of the reaction. (0.5 pt)b) what type of chemical reaction is it? (refer to the 5 types of chemical reactions introduced in this lab) (0.5 pt)2. Another reaction mentioned in the video is “thermite reaction”, a) write the balanced chemical equation for thermite reaction. (0.5 pt)b) what type of reaction is thermite reaction? (refer to the 5 types of chemical reactions introduced in this lab) (0.5 pt)3. Common fuels such as methane, propane and gasoline are carbohydrates. What are the two main products of combustion of all carbohydrates regardless of the identity of carbohydrate? (1 pt)

Order a unique copy of this paper
(550 words)

Approximate price: $22