concentrated hydrochloric acid‚ and then dip it into a small amount of the unknown solid (or solution) to carry out the flame test. 5. Place the wire at the hottest part of a non-luminous Bunsen flame and record the observed colour of the flame. Results Table 1: Compound | Flame Colour | Sodium Na+ | Yellow | Potassium K+ | Lilac | Strontium Sr2+ | Red | Calcium | Orange-red | Copper | Blue-green | Unknown Compound | Lilac | Lithium | Red | Identity of unknown compound: Potassium
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Experiment 7: A Study of Chemical Changes: Types of Chemical Reaction INTRODUCTION Chemical changes are results of chemical reactions. All chemical reactions involve a change in substance and a change in energy. They are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products. There are different types of chemical reaction classified into 4 general types‚ namely‚ Synthesis‚ Decomposition
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* We should follow the rules so that we can maintain peace and organization within our society‚ economy‚ and even our country. Without rules no one would be able to work together. * Two different kinds of people can be heard to utter that question‚ "Why have rules?" One of them does not believe in rules; the other believes in rules and adds a few more words to the question‚ "Why have rules‚ if you are not going to enforce them?" I would like to examine both sides of this argument. Many people
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Micro-Reactions: Predicting the Products of Double Replacement Reactions Introduction – A double replacement reaction is a chemical reaction between two compounds where the positive ion of one compound is exchanged with the positive ion of another compound. If you have the reactants of two reaction solution that you can determine the products. All you need to do is pair the positive parts of the compounds with the other compounds negative part. Once you find the products you can determine their
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The short stories" Rules of the Game" by Amy Tan‚ and "Who’s Irish" by Gish Jen deal with immigrant mothers and their experiences with their daughters. Each story tells how their is a strain on the mother-daughter relationship and a gap with culture. In "Rules of the Game"‚ Amy Tan’s narrator is Waverly Jong. Waverly is forced throughout the story to discover what game she is playing‚ and what rules she must follow in order to succeed in life. Waverly’s chess playing becomes a metaphor for her struggle
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“-ide” then the name follow the following rule; hydro- (stem) - ic acid. If the ending. Just like the fluoride ion‚ which ince the rule is applied becomes hydrofluoric acid. If the naming is “-ite” then the name follows this rule: (stem) - ous acid‚ for example NO₂ or nitrite ion. Once the rule is applied it becomes nitrous acid. If the ion ends in “-ate” then it follows the following rule: (stem) –ic acid. Like the sulfate ion‚ which once applied to the rule becomes sulfuric acid. Other common examples
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CHAPTER I: INTRODUCTION The 1987 Philippine Constitution affirms that education is the birth right of all Filipinos. This means that education should be available to all Filipinos whatever their age‚ creed‚ abilities‚ social and economic status. Educating all Filipino is very great challenge to our educational system. Addressing this Constitutional pronouncement need the dedication and commitment of all teachers that considerably carries the responsibility and accountable to process learning
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National Achievement Test for: Fourth Year EXAMINER’S HANDBOOK Republic of the Philippines Department of Education NATIONAL EDUCATION TESTING AND RESEARCH CENTER Pasig City‚ Philippines 2013 EXAMINER’S HANDBOOK NATIONAL ACHIEVEMENT TEST 1. INTRODUCTION This Examiner’s Handbook is intended for those involved in the administration of the National Achievement Test for Fourth Year students. It outlines the activities to be undertaken at various
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Teacher: Mrs. Pacita J. Yapsangco “Magnetic Field of a Coil” Experiment 2.5 I. Objectives: To produce a strong magnetic field just by looping the wire into coils II. Materials: 6 V or 9 V batteries 50 cm of bare 12- gauge copper wire Stiff cardboard and scissors Wooden dowel (about 15 cm long x 4 cm diameter) Iron filings 2 plotting compasses Connecting wires with alligator clips III. Data/Observations/Results:
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------------------------------------------------- ------------------------------------------------- RESULTS AND DISCUSSION A. Iron-Silver Equilibrium In studying equilibrium between iron and silver‚ 0.10 M FeSO4 and 0.10 M AgNO3 were used. The balanced equation for the reaction is: FeSO4 (aq) + 2 AgNO3 (aq) ↔ Fe(NO3)2 (aq) + Ag2SO4 (s) It has a net equation of: Fe2+(aq) + Ag+(aq) ↔ Fe3+(aq) + Ag(s) This part of the experiment required centrifugation of the solution. This was done to completely
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