Homework Answers
Soaps are potassium or sodium salts of long chain carboxylic acid with the carbon chain varying between C12 to C18 Some common used fatty acids are stearic acid will be written as C17H35COONa. (Assumption - Sodium salt of stearic acid is prepared in lab)
Treating soap with MgCl2 will lead to the formation of its corresponding Magnesium salt. The formula is as follows.
2C17H35COONa + MgCl2
[C17H35COO]2Mg + 2NaCl
Detergents are superior than soaps because
Detergents are sodium salt of long chain hydrocarbons like alkyl sulphates or alkyl benzene sulphonates and can dissolve in hard water containing Mg2+, Ca2+ ions. They are effective in hard, soft and normal water. However, soap has a tendency to precipitate in hard water containing the above ions.
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PROP2027: Preparation and Properties of a Soap - Bettelheim/Landsberg. 9e POST-LABORATORY QUESTIONS 1. Write the chemical...
Answer the following questions for the preparation of soap laboratory Sodium Methylsulfonate is a poor detergent...
Answer the following questions for the preparation of
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#3-4 Post-Laboratory Questions (Use the spaces provided for the answers and additional paper if necessary) 1....
#3-4
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Post Laboratory Questions 1. Write the equation for the decomposition of sulfurous acid. Usingl 2. Using...
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write balanced molevular and ionic equations for each reaction that produced percipitation. Post Laboratory Questions 1....
write balanced molevular and ionic equations for each reaction that
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Post Laboratory Questions 1. Write balanced molecular and ionic equations for each reaction that produced precipitation Compound Molecular Equation Net lonic Equation Ba NO3)2 Na₂504 BalNO3)2 Nach Ba(NO3)2 + rayCD3 | AgNO3 NaBr AgNO3 Ag Noz t NaBr Age Br + 2 Na NO3 AgNO3 + Na +2Br Agt Br + 2 Ag Br + 20 AgNO3 + NaOH - AgoH + Nanoz Agt +N05 + Mat toti...
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Reactions and Neutralization in the Copper Cycle
A Cycle of Chemical Reactions of Copper PRE-LABORATORY ASSIGNMENT Finish the pre-laboratory assignments before the laboratory experiment. Read the manual of this experiment and complete the following questions. 1. a. Identify oxidation-reduction reactions in the copper cycle experiment. For each oxidation-reduction reaction, write half reactions to show what is oxidized and what is reduced. Identify acid-base reactions and precipitation reactions in the copper cycle experi- ment. Write equations for the corresponding reactions. b....
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CHE115 Tear this page out of your laboratory manual Name: our laboratory manual and submit it to your TA with your answers Zinc reacts with lodine in the fixed mass ratio of 1 gram of zinc to ne, how many grams of iodine are required to completely react with B. Post-Lab Assessment Questions: (32 pts) 1. (4 pts) Given that zinc reacts with i 3.88 grams of iodine, how many grams of 4.2 grams of zinc? You must show your...
Answer the following questions for the preparation of
soap laboratory
Sodium Methylsulfonate is a poor detergent Explain why. 4. Write the chemical components of a commercial brand name soap.
#3-4
Post-Laboratory Questions (Use the spaces provided for the answers and additional paper if necessary) 1. A strip of tin (Sn) is placed in an AgNO, solution. ction reaction should ocur (1) Predict whether or not a spontaneous Explain your reasoning oxidation-reduction reaction should occur in this system (2) Write a chemical equation to describe the net reaction, if it is spontaneous. (3) Indicate the experimental observations you would expect for this procedure. 2. The half-cell reactions that occur in...
Post Laboratory Questions 1. Write the equation for the decomposition of sulfurous acid. Usingl 2. Using the three criteria for double displacement reactions, and the solubility table. predict whether a double displacement reaction will occur for each of the following. If the reaction will occur, balance the reaction write conventional, total ionic and net ionic equations. Box the net ionic equation. Be sure to include the proper phase labels. If no reaction will occur. write "no reaction". All reactants are...
write a balanced equation including phases, and identifying
the chemical formula of the precipitate.
Part 1 - Preparation of CaCO3(s) The following is a procedure that was theoretically performed by a student. Read through the procedure and answer the questions below. 1. A 10.0 mL graduated cylinder to measure 10.0 mL of a 1.00 M CaCl2 solution into an initially empty 50.0 mL beaker. 2. A 50.0 ml graduated cylinder was then used to measure out 25.0 mL of 0.500...
5. Why are simple stains able to "stick” to bacteria? Explain the chemical properties of the stain and bacteria surface. 3-Preparation of Bacterial Smears and Simple Stains Introduction Microbial cultures are handled using aseptic technique. Aseptie technique is a set of procedures used to minimize contamination of materials by microorganisms from the environment, and to minimize the spread of cultures around the laboratory. In this experiment, you will be using an inoculating loop to transfer bacteria from a culture tube...
write balanced molevular and ionic equations for each reaction that
produced percipitation.
Post Laboratory Questions 1. Write balanced molecular and ionic equations for each reaction that produced precipitation Compound Molecular Equation Net lonic Equation Ba NO3)2 Na₂504 BalNO3)2 Nach Ba(NO3)2 + rayCD3 | AgNO3 NaBr AgNO3 Ag Noz t NaBr Age Br + 2 Na NO3 AgNO3 + Na +2Br Agt Br + 2 Ag Br + 20 AgNO3 + NaOH - AgoH + Nanoz Agt +N05 + Mat toti...
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Reactions and Neutralization in the Copper Cycle
A Cycle of Chemical Reactions of Copper PRE-LABORATORY ASSIGNMENT Finish the pre-laboratory assignments before the laboratory experiment. Read the manual of this experiment and complete the following questions. 1. a. Identify oxidation-reduction reactions in the copper cycle experiment. For each oxidation-reduction reaction, write half reactions to show what is oxidized and what is reduced. Identify acid-base reactions and precipitation reactions in the copper cycle experi- ment. Write equations for the corresponding reactions. b....
CHE115 Tear this page out of your laboratory manual Name: our laboratory manual and submit it to your TA with your answers Zinc reacts with lodine in the fixed mass ratio of 1 gram of zinc to ne, how many grams of iodine are required to completely react with B. Post-Lab Assessment Questions: (32 pts) 1. (4 pts) Given that zinc reacts with i 3.88 grams of iodine, how many grams of 4.2 grams of zinc? You must show your...
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