Homework Answers
a) the metal oxide in tube 1 decomposed on heating and released oxygen.
b) both metal oxides do not decompose on heating. Only the metal oxide in tube 1 decomposed as indicated by the release of oxygen. The release of oxygen is further proved by by the splinter test. The glowing splint burning with steady flame indicates the presence of oxygen.
c) Based on these observations it can be concluded that metal oxides in tube 2 is more stable than that in tube 1 since metal oxides in tube 1 decomposed and released oxygen on heating while in tube 2 it remained stable.
The general decomposition reaction of metal oxides is
2MO-------> 2M+ Oxygen
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4. Imagine that you are given two metal oxides to study in the lab. You heat...
3. In the lab today you prepared oxygen gas by decomposing hydrogen peroxide. There are many...
3. In the lab today you prepared oxygen gas by decomposing hydrogen peroxide. There are many other chemical reactions that generate gases as one of their products. Lets consider the reaction between zinc metal and hydrochloric acid as such an example. a) (2 pts) What are the products of the chemical reaction that occurs when zinc metal is added to an aqueous solution of Hydrochloric acid? b) (3 pts) Write the chemical equation that represents this reaction? c) (4 pts)...
& cruciblu tungs evap "Brill. I gradu Part I. Combination 1. Obtain a 1-inch piece of...
& cruciblu tungs evap "Brill. I gradu Part I. Combination 1. Obtain a 1-inch piece of magnesium ribbon. Hold the piece of Mg ribbon with your crucible e tongs and ignite it with your Bunsen burner. Caution! Do not look directly at the burning rib- bon. TABLE 9.6 Observations combustion of magnesium ribbon Sparks were present. Bright light came out just when it was burned enough Color Enange towhite 7 and the piece That was bumed was broken to pieces....
Dala Shoot! Chemical Reactions 2. in a clean, dry test tube, place a small amount of...
Dala Shoot! Chemical Reactions 2. in a clean, dry test tube, place a small amount of calcium carbonate. Carefully and slowly add about 3 mL of 6 M HCl solution. Remember that carbonic acid is NOT a gas, but an aqueous acid that decomposes into carbon dioxide and water. Allow the reaction to proceed for 60 seconds, the insert a lit splint into the test tube. What did you observe? From your observation, determine what gas is evolved. TABLE 9.17...
Dala Shoot! Chemical Reactions 2. in a clean, dry test tube, place a small amount of...
Dala Shoot! Chemical Reactions 2. in a clean, dry test tube, place a small amount of calcium carbonate. Carefully and slowly add about 3 mL of 6 M HCl solution. Remember that carbonic acid is NOT a gas, but an aqueous acid that decomposes into carbon dioxide and water. Allow the reaction to proceed for 60 seconds, the insert a lit splint into the test tube. What did you observe? From your observation, determine what gas is evolved. TABLE 9.17...
Suplementary Questions Carbon Dioxide Conclusions 1. Can a candle burn in carbon dioxide? Does ca...
Suplementary Questions Carbon Dioxide Conclusions 1. Can a candle burn in carbon dioxide? Does carbon dioxide burn? 2. What happened to the burning candle? Could carbon dioxide be used as a fire extinguisher? 3. Why should you release the carbon dioxide into the bottom of the cup? Hydrogen Conclusions 1. What difference did you notice between Parts 1 and 2 in the hydrogen experiment? Explain. 2. What is the purpose of the soap solution? 3. Why should extreme care be...
1 Reaction C: Copper(II) Hydroxide to Copper(IT) Oxide Observations: The solntich goes from a light blue...
1 Reaction C: Copper(II) Hydroxide to Copper(IT) Oxide Observations: The solntich goes from a light blue to a dark blue. when heated the solution turns to a green/black color. Balanced Molecular Equation: Balanced Net lonie Equation: Reaction D: Copper(IT) Oxide to Copper(II) Sulfate Observations: "The back sond is dissolved in the acid. This creates a light blue / Clear solurich Balanced Molecular Equation: Balanced Net Ionic Equation: Reaction E: Copper(II) Sulfate to Copper Metal (and Dissolution of excess Mg) Observations:...
A sentence or two stating the hypothesis or hypotheses made. A sentence or two describing what...
A sentence or two stating the hypothesis or hypotheses
made.
A sentence or two describing what was done
A summary of the most important results
A sentence stating the major conclusion
EXPERIMENT 2: CHARACTERIZING BACTERIA ISOLATED FROM SOIL Data Tables Table 1: Gram Staining Observations Sample Colony 1 Colony 2 Colony 3 + "Normal" + "Heated" Table 2: Experiment 2b Catalase Assay Results Colony Catalase Assay Results ("Normal") Catalase Assay Results ("Heated') 1 2 3 + Characterizing Bacteria Isolated from...
Pre-Laboratory Exercise: Plastics Identification I. List four properties that you will use in lab...
can
someone help me find this information?
Pre-Laboratory Exercise: Plastics Identification I. List four properties that you will use in lab to determine the identity of the polymer samples 2. Describe the density test. What observation will help you determine the density of each polymer? What precautions should be taken in placing the sample in the solutions? 3. Write the name and abbreviation for the six recyclable polymers 2 huetn deisity polyetayene.HDpz poulene: PP 4. Given the list of wavenumber...
3. In the lab today you prepared oxygen gas by decomposing hydrogen peroxide. There are many other chemical reactions that generate gases as one of their products. Lets consider the reaction between zinc metal and hydrochloric acid as such an example. a) (2 pts) What are the products of the chemical reaction that occurs when zinc metal is added to an aqueous solution of Hydrochloric acid? b) (3 pts) Write the chemical equation that represents this reaction? c) (4 pts)...
& cruciblu tungs evap "Brill. I gradu Part I. Combination 1. Obtain a 1-inch piece of magnesium ribbon. Hold the piece of Mg ribbon with your crucible e tongs and ignite it with your Bunsen burner. Caution! Do not look directly at the burning rib- bon. TABLE 9.6 Observations combustion of magnesium ribbon Sparks were present. Bright light came out just when it was burned enough Color Enange towhite 7 and the piece That was bumed was broken to pieces....
Dala Shoot! Chemical Reactions 2. in a clean, dry test tube, place a small amount of calcium carbonate. Carefully and slowly add about 3 mL of 6 M HCl solution. Remember that carbonic acid is NOT a gas, but an aqueous acid that decomposes into carbon dioxide and water. Allow the reaction to proceed for 60 seconds, the insert a lit splint into the test tube. What did you observe? From your observation, determine what gas is evolved. TABLE 9.17...
Dala Shoot! Chemical Reactions 2. in a clean, dry test tube, place a small amount of calcium carbonate. Carefully and slowly add about 3 mL of 6 M HCl solution. Remember that carbonic acid is NOT a gas, but an aqueous acid that decomposes into carbon dioxide and water. Allow the reaction to proceed for 60 seconds, the insert a lit splint into the test tube. What did you observe? From your observation, determine what gas is evolved. TABLE 9.17...
Suplementary Questions Carbon Dioxide Conclusions 1. Can a candle burn in carbon dioxide? Does carbon dioxide burn? 2. What happened to the burning candle? Could carbon dioxide be used as a fire extinguisher? 3. Why should you release the carbon dioxide into the bottom of the cup? Hydrogen Conclusions 1. What difference did you notice between Parts 1 and 2 in the hydrogen experiment? Explain. 2. What is the purpose of the soap solution? 3. Why should extreme care be...
1 Reaction C: Copper(II) Hydroxide to Copper(IT) Oxide Observations: The solntich goes from a light blue to a dark blue. when heated the solution turns to a green/black color. Balanced Molecular Equation: Balanced Net lonie Equation: Reaction D: Copper(IT) Oxide to Copper(II) Sulfate Observations: "The back sond is dissolved in the acid. This creates a light blue / Clear solurich Balanced Molecular Equation: Balanced Net Ionic Equation: Reaction E: Copper(II) Sulfate to Copper Metal (and Dissolution of excess Mg) Observations:...
A sentence or two stating the hypothesis or hypotheses
made.
A sentence or two describing what was done
A summary of the most important results
A sentence stating the major conclusion
EXPERIMENT 2: CHARACTERIZING BACTERIA ISOLATED FROM SOIL Data Tables Table 1: Gram Staining Observations Sample Colony 1 Colony 2 Colony 3 + "Normal" + "Heated" Table 2: Experiment 2b Catalase Assay Results Colony Catalase Assay Results ("Normal") Catalase Assay Results ("Heated') 1 2 3 + Characterizing Bacteria Isolated from...
can
someone help me find this information?
Pre-Laboratory Exercise: Plastics Identification I. List four properties that you will use in lab to determine the identity of the polymer samples 2. Describe the density test. What observation will help you determine the density of each polymer? What precautions should be taken in placing the sample in the solutions? 3. Write the name and abbreviation for the six recyclable polymers 2 huetn deisity polyetayene.HDpz poulene: PP 4. Given the list of wavenumber...
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