Homework Answers
First of all, your answer to question D is incorrect as per your observation. You mentioned that, when you added heat, the reaction shifts to LEFT! This is the case when a reaction is EXOTHERMIC and not ENDOthermic, because, in case of an EXOTHERMIC reaction only, heat is a product and when you supply heat to the equilibrium system i.e. you are actually supplying the products to the system and according to Le-Chatelier's principle, the addition of product will drive the reaction to LEFT!. I hope you figured it out now.
Now, as mentioned above, that heat is a product in Exothermic reaction, the thermochemical equation for this equilibrium is-
,
where 
represents the change in heat during the reaction and it is always
on the product side for an Exothermic reaction.
Add Answer to:
can
you please check me and tell me how i write thermal equation
?!
We were...
what are the chemical reactions for 2,3,4,5,7,8,9 if you're adding each of those to the balanced...
what are the chemical reactions for 2,3,4,5,7,8,9 if
you're adding each of those to the balanced equation from the
instructions which is Fe3+ + SCN---> FeSCN2+
PROCEDURE dean 400 ml beaker add 125 ml of delonized water, 10 drops of MKSCN and 10 drops A u ton This stack solution will have an intense red color due to the formation FeSON Onain 10 clean medium-sited test tubes and label them I through 10. Add 10 mL of the ution into...
are theses correct? please correct me if they are not. Results Fe Test Tube 2: FeSCN...
are
theses correct?
please correct me if they are not.
Results Fe Test Tube 2: FeSCN (aa) SCN () Fe Chemical equation: Explanation: The equilibrium shifted toward the increased the due to the addition of Fe(NO,)) because it of the Test Tube 3: FESCN 0) SCN () (as Chemical equation: Fe(ag) Explanation: Test Tube 4: Chemical equation: Fe(agk FeSCN( (aq)h Explanation: Test Tube 5: Chemical equation: Fe"( SCN () FESCN 3+ + (sq) Explanation: Test Tube 6 Chemical equation: Fe(a...
Introduction to Equilibrium Lab report Please help answering the question #2 (a,b,c,d) Thanks! ...
Introduction to Equilibrium Lab report
Please help answering the question #2 (a,b,c,d)
Thanks!
Question
Procedure
Notebook
Complex ion equilibrium 1. Formation of the complex ion: 38 a) What evidence was there that a new chemical substance had formed? b) How did the reaction change the initial iron and thiocyanate concentrations? Would the reacon av tken place ifthe proportions hadtbenhioneric raior? 2. Adding and removing reactants: a) What effecet did adding the reactants (Fe' or SCN-) have on he briumcmposition? evidence...
2130 D. HYDROLYSIS OF DISACCHARIDES and POLYSACOLARIDES Make sure you understand what you are doing bore...
2130 D. HYDROLYSIS OF DISACCHARIDES and POLYSACOLARIDES Make sure you understand what you are doing bore Both the lodine Test and Benedict's best becau described below. Label test tubes so they are t s See the datatable for any that you pre heated in a hot waterbuch e e h 1. You will need 4 test tubes, 1 and 2 forstarch and dowe l of such to test tubes 1 and 2 Add a small pinch of sucrose to test...
Hi there Im having trouble with the last question on my lab report sheet. Would both...
Hi there
Im having trouble with the last question on my lab report sheet.
Would both equations be considered correct because they share the
common ion effect? Please explain; thank you in advance!!
Section E: Thiocyano-iron III Complex Ion: Fe + SCN = FeSCN2+ Yellow red Stress to system Observation Shift CIE or Chem Rx Add 0.2M Fe(NO3)3 Solution fums right Fe3+ + 3NO₂ darker red CIE Add 0.1M KSCN solution turns K + SON darker red right CIE Add...
Can someone help me with the color reactions, positive and negative control, and the 6 questions?...
Can someone help me with the color reactions, positive
and negative control, and the 6 questions?
Sudan IV Test for Lipid 1. Obtain five test tubes and number them 1-5. Your instructor may ask you to test some additional materials. If so, include additional numbered test tubes. 2. To each tube, add the materials listed in Table 3. 3. Add five drops of water to tube 1 and five drops of Sudan IV to each of the remaining tubes. Mix...
Questions: 1. What is responsible for a positive Benedict's test? 12-KI test? 2. What is responsi...
Questions: 1. What is responsible for a positive Benedict's test? 12-KI test? 2. What is responsible for a positive Biuret test? How are lipids detected? 3. Which biomolecules are present in the food samples? Procedure: Benedict's test 1. Fill 100 mL Beaker with 40 mL of water. 2. Place the burner stand over the burner and light it up using a match. 3. Place the beaker containing water over the burner stand to make a water bath. 4. Label 3...
please correct me If I did anything wrong. im very confused on this. • Determining k...
please correct me If I did anything wrong. im very confused on
this.
• Determining k in Beer's Law 2. Determining the equilibrium constant Test Tube No. Absorbance Test Tube No. Absorbance 0,060 이79 0.253 0319 0.400 0.120 0.268 0.361 0.461 0.695 Post Laboratory Questions 1. Complete the following table and calculate k-value for the Beer's Law. All concentrations should be in M. [Fe(SCN)2) Absorbance CA Test Tube No. Diluted Fe(NO3)2 (mL) 0 . 2 3 4 s Reference 1.0...
Part C. Benedict's Test. Test Tube Samp Prediction Observations Results (+ or -) 2-hydroxybutanal Benzaldehyde Propanone...
Part C. Benedict's Test. Test Tube Samp Prediction Observations Results (+ or -) 2-hydroxybutanal Benzaldehyde Propanone Cyclohexanone Unknown Part D. Iodoform Test. Test Sample Tube 1 2-hydroxybutanal Prediction Observations Results (+ or -) Benzaldehyde Propanone Cyclohexanone Unknown Experiment 12 Identification of Aldehydes and Ketones O the b e t theader of each holding your breath as a st beward your nose. Record the derson the specified memes from O Ta Test g shes between ones that contain a methyl group...
The concentration of a diluted "wine" sample was found to be 0.32 %(v/v) ethanol. Assuming the...
The concentration of a diluted
"wine" sample was found to be 0.32 %(v/v) ethanol. Assuming the
dilution was done as described in Part B of the procedure for this
lab, what was the original concentration of ethanol in the "wine"?
Enter your answer with 2 significant figures.
B. Preparation of Unknown Samples 1. Label two small test tubes "wine" and "breath”. 2. Use a disposable pipette, add 1.0 mL (25 drops) of “wine” solution to the wine test tube. a....
what are the chemical reactions for 2,3,4,5,7,8,9 if
you're adding each of those to the balanced equation from the
instructions which is Fe3+ + SCN---> FeSCN2+
PROCEDURE dean 400 ml beaker add 125 ml of delonized water, 10 drops of MKSCN and 10 drops A u ton This stack solution will have an intense red color due to the formation FeSON Onain 10 clean medium-sited test tubes and label them I through 10. Add 10 mL of the ution into...
are
theses correct?
please correct me if they are not.
Results Fe Test Tube 2: FeSCN (aa) SCN () Fe Chemical equation: Explanation: The equilibrium shifted toward the increased the due to the addition of Fe(NO,)) because it of the Test Tube 3: FESCN 0) SCN () (as Chemical equation: Fe(ag) Explanation: Test Tube 4: Chemical equation: Fe(agk FeSCN( (aq)h Explanation: Test Tube 5: Chemical equation: Fe"( SCN () FESCN 3+ + (sq) Explanation: Test Tube 6 Chemical equation: Fe(a...
Introduction to Equilibrium Lab report
Please help answering the question #2 (a,b,c,d)
Thanks!
Question
Procedure
Notebook
Complex ion equilibrium 1. Formation of the complex ion: 38 a) What evidence was there that a new chemical substance had formed? b) How did the reaction change the initial iron and thiocyanate concentrations? Would the reacon av tken place ifthe proportions hadtbenhioneric raior? 2. Adding and removing reactants: a) What effecet did adding the reactants (Fe' or SCN-) have on he briumcmposition? evidence...
2130 D. HYDROLYSIS OF DISACCHARIDES and POLYSACOLARIDES Make sure you understand what you are doing bore Both the lodine Test and Benedict's best becau described below. Label test tubes so they are t s See the datatable for any that you pre heated in a hot waterbuch e e h 1. You will need 4 test tubes, 1 and 2 forstarch and dowe l of such to test tubes 1 and 2 Add a small pinch of sucrose to test...
Hi there
Im having trouble with the last question on my lab report sheet.
Would both equations be considered correct because they share the
common ion effect? Please explain; thank you in advance!!
Section E: Thiocyano-iron III Complex Ion: Fe + SCN = FeSCN2+ Yellow red Stress to system Observation Shift CIE or Chem Rx Add 0.2M Fe(NO3)3 Solution fums right Fe3+ + 3NO₂ darker red CIE Add 0.1M KSCN solution turns K + SON darker red right CIE Add...
Can someone help me with the color reactions, positive
and negative control, and the 6 questions?
Sudan IV Test for Lipid 1. Obtain five test tubes and number them 1-5. Your instructor may ask you to test some additional materials. If so, include additional numbered test tubes. 2. To each tube, add the materials listed in Table 3. 3. Add five drops of water to tube 1 and five drops of Sudan IV to each of the remaining tubes. Mix...
Questions: 1. What is responsible for a positive Benedict's test? 12-KI test? 2. What is responsible for a positive Biuret test? How are lipids detected? 3. Which biomolecules are present in the food samples? Procedure: Benedict's test 1. Fill 100 mL Beaker with 40 mL of water. 2. Place the burner stand over the burner and light it up using a match. 3. Place the beaker containing water over the burner stand to make a water bath. 4. Label 3...
please correct me If I did anything wrong. im very confused on
this.
• Determining k in Beer's Law 2. Determining the equilibrium constant Test Tube No. Absorbance Test Tube No. Absorbance 0,060 이79 0.253 0319 0.400 0.120 0.268 0.361 0.461 0.695 Post Laboratory Questions 1. Complete the following table and calculate k-value for the Beer's Law. All concentrations should be in M. [Fe(SCN)2) Absorbance CA Test Tube No. Diluted Fe(NO3)2 (mL) 0 . 2 3 4 s Reference 1.0...
Part C. Benedict's Test. Test Tube Samp Prediction Observations Results (+ or -) 2-hydroxybutanal Benzaldehyde Propanone Cyclohexanone Unknown Part D. Iodoform Test. Test Sample Tube 1 2-hydroxybutanal Prediction Observations Results (+ or -) Benzaldehyde Propanone Cyclohexanone Unknown Experiment 12 Identification of Aldehydes and Ketones O the b e t theader of each holding your breath as a st beward your nose. Record the derson the specified memes from O Ta Test g shes between ones that contain a methyl group...
The concentration of a diluted
"wine" sample was found to be 0.32 %(v/v) ethanol. Assuming the
dilution was done as described in Part B of the procedure for this
lab, what was the original concentration of ethanol in the "wine"?
Enter your answer with 2 significant figures.
B. Preparation of Unknown Samples 1. Label two small test tubes "wine" and "breath”. 2. Use a disposable pipette, add 1.0 mL (25 drops) of “wine” solution to the wine test tube. a....
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