In a dry evaporating dish 7.50 g solid copper (II) sulfate pentahydrate was dissolved in 30.0...
In a dry evaporating dish 7.50 g solid copper (II) sulfate pentahydrate was dissolved in 30.0 ml of deionized water at 60.0 o C. While stirring, slowly 1.23 g of iron powder was added to the solution. The solution was allowed to sit for 10 minutes and then the liquid from the evaporating dish was decanted. The solid was washed with cold deionized water and dried on a hot plate. The weight of the dry solid in the evaporating dish was determined to be 1.33 g. Identify the solid and determine the percent yield at the end of the experiment.
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In a dry evaporating dish 7.50 g solid copper (II) sulfate
pentahydrate was dissolved in 30.0...
12 If white anhydrous copper(II) sulfate powder is left in the atmosphere it slowly absorbs water...
12 If white anhydrous copper(II) sulfate powder is left in the atmosphere it slowly absorbs water vapour giving the blue pentahydrated solid. Cuso (s) + SH,O(1) CuSO, SH,O(s) (anhydrous) (pentahydrated) It is difficult to measure the enthalpy change for this reaction directly. However, it is possible to measure the heat changes directly when both anhydrous and pentahydrated copper(II) sulfate are separately dissolved in water, and then use an energy cycle to determine the required enthalpy change value, AH,, indirectly. AH...
Finely ground mineral (0.5864 g) was dissolved in 25 mL of boiling 4 M HCl and...
Finely ground mineral (0.5864 g) was dissolved in 25 mL of boiling 4 M HCl and diluted with 175 mL H2O containing two drops of methyl red indicator. The solution was heated to 100C, and 50 mL of warm solution containing 2.0 g (NH4)2C2O4 were slowly added to precipitate CaC2O4. Then 6 M NH3 was added until the indicator changed from red to yellow, showing that the liquid was neutral or slightly basic. After slow cooling for 1 h, the...
The first picture is used for question #2, and question #3 can be normally answered. I...
The first picture is used for question #2, and question #3 can
be normally answered. I believe the answer to question 3 is ->
0.07144M. However I would like someone to check it. I am not sure
about 2.
BE SURE THAT YOU RECORD ALL OF YOUR DATA AND LABEL PROPERLY FOR PARTI OF THIS LABORATORY EXPERIMENT. YOU WILL NEED TO ACCESS THIS INFORMATION IN THREE WEEKS. Part I Synthesis of the Complex Salt containing Copper Procedure 16.004 1. In...
I really just need all the equations, please and thank you. MATERIALS: cene nitric acid, HNO,...
I really just need all the equations, please and thank you.
MATERIALS: cene nitric acid, HNO, 3.0M sodium hydroxide, NaOH 6.0 M sulfuric acid, H2SO4 zine metal DI water PROCEDURE: Make sure you record detailed observations after almost every step. You will also need to write the balanced chemical equations for almost every step. Make sure you answer any questions associated with a step 1. Weigh approximately 0.5 g of copper metal and record the weight. Place the copper in...
Please help! (These are the instructions I had) 1) Preparation of K2[Cu(C2O4)2] 2H2O CuSO4•5H2O + 2K2C2O4•H2O...
Please help! (These are the instructions I had) 1) Preparation of K2[Cu(C2O4)2] 2H2O CuSO4•5H2O + 2K2C2O4•H2O → K2[Cu(C2O4)2]•2H2O + K2SO4 + 5H2O Heat a solution of 2.5g of potassium oxalate monohydrate in 12.5mL of water contained in a 50mL beaker (approx. 90°C). Heat 1.55g of copper sulfate pentahydrate in 3mL of water to about 90°C and add it rapidly, with vigorous stirring to the hot potassium oxalate solution. Set on the bench and allow to cool to room temperature then...
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:...
just making sure did I do right in number 10. and im confused at number 11...
just making sure did I do right in number 10. and im confused at
number 11 and 12 13. becausse we didnt learn in class. please help.
thanks for your patient
PROCEDURE 1. This experiment is to be conducted individually. on the side shelf: small squares of copper, NaOH, HSO in the hood: conc. HNOs, conc. HC 2. The following items will be found 4 Use your brush and some soap solution to wash your casserole dish as well as...
What are the desirable characteristics of a solvent to be used in the recrystallisation of a...
What are the desirable characteristics of a solvent to be used
in the recrystallisation of a solid product? (Hint: what is the
underlying purpose of doing recrystallisation, aside from making
the product look attractive?)
EXPERIMENT5 PREPARATION OF BENZOIC ACID Oxidation of a Primary Alcohol In this experiment, a primary alcohol (benzyl alcohol) is oxidised to a carboxylic acid (benzoic acid) by a strong oxidising agent (potassium permanganate) Because the synthesis reaction is carried out in basic conditions, the carboxylic acid...
Introduction: The technique used to separate an organic compound from a mixture of compounds is called...
Introduction: The technique used to separate an organic compound from a mixture of compounds is called Extraction. Extraction process selectively dissolves one or more of the mixture compounds into a suitable solvent. The solution of these dissolved compounds is referred to as the Extract. Here the organic solvent dichloromethane is used to extract caffeine from an aqueous extract of tea leaves because caffeine is more soluble in dichloromethane (140 mg/ml) than it is in water (22 mg/ml). However, there are...
Experiment . the reduction of bencil (March 2020) Your name Sodium borohydride is a convert recent...
Experiment . the reduction of bencil (March 2020) Your name Sodium borohydride is a convert recent for the reduction of dehydes and ketones to 1" and 2 alcohols, respectively. The mechanism of the reaction - (below) is straightforward and is driven by boron's affinity for oxygen. In addition, given borohydride's remarkably low reactivity with OH groups under neutral and especially basic conditions, this reaction can be done in alcohol solvents. This means that (unlike LAH or Grignard reactions) no separate...
12 If white anhydrous copper(II) sulfate powder is left in the atmosphere it slowly absorbs water vapour giving the blue pentahydrated solid. Cuso (s) + SH,O(1) CuSO, SH,O(s) (anhydrous) (pentahydrated) It is difficult to measure the enthalpy change for this reaction directly. However, it is possible to measure the heat changes directly when both anhydrous and pentahydrated copper(II) sulfate are separately dissolved in water, and then use an energy cycle to determine the required enthalpy change value, AH,, indirectly. AH...
The first picture is used for question #2, and question #3 can
be normally answered. I believe the answer to question 3 is ->
0.07144M. However I would like someone to check it. I am not sure
about 2.
BE SURE THAT YOU RECORD ALL OF YOUR DATA AND LABEL PROPERLY FOR PARTI OF THIS LABORATORY EXPERIMENT. YOU WILL NEED TO ACCESS THIS INFORMATION IN THREE WEEKS. Part I Synthesis of the Complex Salt containing Copper Procedure 16.004 1. In...
I really just need all the equations, please and thank you.
MATERIALS: cene nitric acid, HNO, 3.0M sodium hydroxide, NaOH 6.0 M sulfuric acid, H2SO4 zine metal DI water PROCEDURE: Make sure you record detailed observations after almost every step. You will also need to write the balanced chemical equations for almost every step. Make sure you answer any questions associated with a step 1. Weigh approximately 0.5 g of copper metal and record the weight. Place the copper in...
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:...
just making sure did I do right in number 10. and im confused at
number 11 and 12 13. becausse we didnt learn in class. please help.
thanks for your patient
PROCEDURE 1. This experiment is to be conducted individually. on the side shelf: small squares of copper, NaOH, HSO in the hood: conc. HNOs, conc. HC 2. The following items will be found 4 Use your brush and some soap solution to wash your casserole dish as well as...
What are the desirable characteristics of a solvent to be used
in the recrystallisation of a solid product? (Hint: what is the
underlying purpose of doing recrystallisation, aside from making
the product look attractive?)
EXPERIMENT5 PREPARATION OF BENZOIC ACID Oxidation of a Primary Alcohol In this experiment, a primary alcohol (benzyl alcohol) is oxidised to a carboxylic acid (benzoic acid) by a strong oxidising agent (potassium permanganate) Because the synthesis reaction is carried out in basic conditions, the carboxylic acid...
Experiment . the reduction of bencil (March 2020) Your name Sodium borohydride is a convert recent for the reduction of dehydes and ketones to 1" and 2 alcohols, respectively. The mechanism of the reaction - (below) is straightforward and is driven by boron's affinity for oxygen. In addition, given borohydride's remarkably low reactivity with OH groups under neutral and especially basic conditions, this reaction can be done in alcohol solvents. This means that (unlike LAH or Grignard reactions) no separate...
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