Chemistry
Homework Answers
This is a question of mass balance. The key is that some gas (bubbling) was lost, explaining the mass difference.
The equation is:
mass starting materials = mass products
So,
18.00 g CaCO3 + 72.90 g solution = 83.52 g solution + mass gas
90.90 g = 83.52 + mass gas
mass gas = 90.90 - 83.52 = 7.38.
Thus, 7.38 grams of gas were produced in this reaction.
Part B Phosphoric acid reacts with magnesium hydroxide to produce magnesium phosphate and water via the...
Part B Phosphoric acid reacts with magnesium hydroxide to produce magnesium phosphate and water via the following reaction: ?H.PO, + ? Mg(OH)2 → ? Mg(PO4)2 +? H2O Balance the equation, then enter the coefficients, in order, in the answer box Enter four integers separated by commas. View Available Hint(s) Part C You carefully weigh out 13.00 g of CaCO, powder and add it to 52.65 g of HCl solution. You notice bubbles as a reaction takes place. You then weigh...
Please answer al three questions. Thank you!! I Review I Constants I Periodic Table When a...
Please answer al three questions. Thank you!!
I Review I Constants I Periodic Table When a chemical reaction occurs, atoms rearrange to form new compounds, but no new atoms are created nor are any destroyed. This concept is called conservation of Part A mass. Mass conservation can be seen in a balanced chemical equation, where the numbers of each kind of atom are the same on both sides of the reaction arrow. The figure (Figure 1) shows the reaction of...
Chemistry Laboratory Manual 2017 Revision 3) Get a medium test tube and place about 2 ml...
Chemistry Laboratory Manual 2017 Revision 3) Get a medium test tube and place about 2 ml of hydrochloric acid into it. Now add a piece of magnesium metal and notice what happens over time Evidence of a shemical reaction white bubbles Balanced chemical equation: Balanced lonie equation: Balanced net ionic equation: 4) Demonstration: Your instructor will demonstrate the reaction that takes place between lithium metal and water. The demonstration will include a test of the resulting solution with universal indicator...
the 3 pages deal with limiting reactant and percentage yield. the mixture starts out as a...
the 3 pages deal with limiting reactant and percentage yield.
the mixture starts out as a bright blue and when spinning in the
cup smokes ans starts to tirn a black color and the end result is a
brown color. then the funnel part was a light blue color.
1. Weigh approximately 7.0 g of CuCl2 and place them in the 100 ml beaker. Record the exact mass in the data table below. Note the appearance of the CuCl2 crystals...
Objective Find the ratio of moles of reactant to moles of a product for the reaction...
Objective Find the ratio of moles of reactant to moles of a product for the reaction below. Compare mass and mole amounts of reactants to determine the amount of products that can be/are made. Background Chemical reactions are represented by balanced chemical equations. Proper interpretation of an equation provides a great deal of information about the reaction it represents and about the substances involved in the reaction. For example, the coefficients in a balanced equation indicate the number of moles...
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...
Multistep Synthesis: Synthesis of Amine (Organic Chemistry Lab) Question 1. Explain each step of reaction mechanism....
Multistep Synthesis: Synthesis of Amine (Organic Chemistry
Lab)
Question
1. Explain each step of reaction mechanism. (How does it
work?)
2. Discuss reason for reaction sequence. (Why must one reaction
occur before another?)
3. Explain how IR supports the major product.
Experiment Procedure
Imine Formation:
Weigh a 20 mL beaker and then add 380 mg of ortho-vanillin and
268 mg of para-toluidine. Care should be taken to add equivalent
molar amounts of the two reactants.
Observe the mixture and record...
4. In parts I and II of this experiment, were the same atoms oxidized? Explain. 83...
4. In parts I and II of this experiment, were the same atoms oxidized? Explain. 83 When this reaction occurs, the Zn atom loses two electrons. Two fodine atoms pick up one electron cach from the Zn. In the second part of the experiment the Znly that you formed will undergo electrolysis using a battery to decompose into elemental zinc cathode. These electrons are picked up by Zn2+ sons producing metallic Zn, which accumulates on the copper cathode. Zn2+ +...
Determine the percent yield of copper. 3. What is the theoretical yield of copper produced by...
Determine the percent yield of copper.
3. What is the theoretical yield of copper produced by this reaction? Materials: Copper (II) chloride • Aluminum foil • Stirring rod • Two 100 ml beakers • Graduated cylinder • Safety glasses • Spatula or scoopula • Balance Filter paper front counter Funnel • Watch glass Ring stand • Iron ring Safety: Safety glasses must be worn at all times! Copper (II) chloride is an irritant and moderately toxic. Avoid inhaling the powder...
Part B Phosphoric acid reacts with magnesium hydroxide to produce magnesium phosphate and water via the following reaction: ?H.PO, + ? Mg(OH)2 → ? Mg(PO4)2 +? H2O Balance the equation, then enter the coefficients, in order, in the answer box Enter four integers separated by commas. View Available Hint(s) Part C You carefully weigh out 13.00 g of CaCO, powder and add it to 52.65 g of HCl solution. You notice bubbles as a reaction takes place. You then weigh...
Please answer al three questions. Thank you!!
I Review I Constants I Periodic Table When a chemical reaction occurs, atoms rearrange to form new compounds, but no new atoms are created nor are any destroyed. This concept is called conservation of Part A mass. Mass conservation can be seen in a balanced chemical equation, where the numbers of each kind of atom are the same on both sides of the reaction arrow. The figure (Figure 1) shows the reaction of...
Chemistry Laboratory Manual 2017 Revision 3) Get a medium test tube and place about 2 ml of hydrochloric acid into it. Now add a piece of magnesium metal and notice what happens over time Evidence of a shemical reaction white bubbles Balanced chemical equation: Balanced lonie equation: Balanced net ionic equation: 4) Demonstration: Your instructor will demonstrate the reaction that takes place between lithium metal and water. The demonstration will include a test of the resulting solution with universal indicator...
the 3 pages deal with limiting reactant and percentage yield.
the mixture starts out as a bright blue and when spinning in the
cup smokes ans starts to tirn a black color and the end result is a
brown color. then the funnel part was a light blue color.
1. Weigh approximately 7.0 g of CuCl2 and place them in the 100 ml beaker. Record the exact mass in the data table below. Note the appearance of the CuCl2 crystals...
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...
Multistep Synthesis: Synthesis of Amine (Organic Chemistry
Lab)
Question
1. Explain each step of reaction mechanism. (How does it
work?)
2. Discuss reason for reaction sequence. (Why must one reaction
occur before another?)
3. Explain how IR supports the major product.
Experiment Procedure
Imine Formation:
Weigh a 20 mL beaker and then add 380 mg of ortho-vanillin and
268 mg of para-toluidine. Care should be taken to add equivalent
molar amounts of the two reactants.
Observe the mixture and record...
4. In parts I and II of this experiment, were the same atoms oxidized? Explain. 83 When this reaction occurs, the Zn atom loses two electrons. Two fodine atoms pick up one electron cach from the Zn. In the second part of the experiment the Znly that you formed will undergo electrolysis using a battery to decompose into elemental zinc cathode. These electrons are picked up by Zn2+ sons producing metallic Zn, which accumulates on the copper cathode. Zn2+ +...
Determine the percent yield of copper.
3. What is the theoretical yield of copper produced by this reaction? Materials: Copper (II) chloride • Aluminum foil • Stirring rod • Two 100 ml beakers • Graduated cylinder • Safety glasses • Spatula or scoopula • Balance Filter paper front counter Funnel • Watch glass Ring stand • Iron ring Safety: Safety glasses must be worn at all times! Copper (II) chloride is an irritant and moderately toxic. Avoid inhaling the powder...
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