For endo/exothermic reactions, will the final temperature be higher or lower? In the lab, should you...
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For endo/exothermic reactions, will the final temperature be higher or lower?
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In the lab, should you add acid to water, or water to acid?
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Which is the larger quantity, solvent or solute?
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In aqueous solution of NaCl, is water the solvent or solute?
Homework Answers
The reaction which absorbs heat energy is called endothermic reaction. Since it uses heat energy,final temperature will decrease
Te reaction which release heat energy is called exothermic reaction. Since heat is released during the process, final temperature will rise
********
2) Acid should be added to water in order to avoid accidents . When we add concentrated acid to water, little by little,the
solution will be in diluted form ,which is safe for handling.
***
In a solution, the solvent will be in larger quantity and solute in lesser quantity.
Aqueous solution means solvent is water. NaCl is the solute
Add Answer to:
For endo/exothermic reactions, will the final
temperature be higher or lower?
In the lab, should you...
10- Hess Lab Section: eriment Nine - Endo-and Exo-Thermic Reactions: Hess's Law troduction experiment, you will...
10- Hess Lab Section: eriment Nine - Endo-and Exo-Thermic Reactions: Hess's Law troduction experiment, you will use a Styrofoam-cup calorimeter to measure the heat released by three rea the reactions is the same as the combination of the other two reactions. Therefore, according law, the heat of reaction of the one reaction should be equal to the sum of the heats of reaction wo. This concept is sometimes referred to as the additivity of heats of reaction. The primary ob...
UUTIIL NAME: PRE-LAB ENDOTHERMIC AND EXOTHERMIC REACTIONS. VERNIER Consider the following Data 59°C Final temperature, 1...
UUTIIL NAME: PRE-LAB ENDOTHERMIC AND EXOTHERMIC REACTIONS. VERNIER Consider the following Data 59°C Final temperature, 1 (°C) 39°C Initial temperature, (°C) Temperature change, A/ (°C) PROCESSING THE DATA 1. Calculate the temperature change, A1, for the reaction by subtracting the initial temperature, 1, from the final temperature, 1. (Ar=1:- ). 2. Calculate the amount of heat energy, g, produced in each reaction. Use 1.03 g/mL for the density of all solutions. Use the specific heat of water, 4.18 J/(g•°C), for...
QUESTION 4 If you take a 171 mL of a 1.4 M NaCl solution and dilute...
QUESTION 4
If you take a 171 mL of a 1.4 M NaCl solution and dilute it to
500 mL, what is the molarity of the final solution?
Enter the numerical answer in decimal notation
QUESTION 10
Information - Colligative
Properties
Colligative properties of solutions are those properties which
depend only on the number of dissolved solute particles in solution
not the chemical properties of the solute. For example when a
solute is dissolved in a solvent, vapor pressure
depression...
Answer the following before coming to lab: 1.) Based on what you saw last week, which...
Answer the following before coming to lab: 1.) Based on what you saw last week, which enantiomer of tartaric acid would you expect to co- crystallize with (SS)-1,2-diammoniumcyclohexane? 2.) If you had a neutral aqueous solution of triethylamine, would you add acid or base in order to extract it with an organic solvent? 3.) Now, consider a dichloromethane solution of triethylamine. Would you extract with acidic aqueous or basic aqueous solution in order to get the triethylamine out of the...
Chemistry 2A Lab 13: Solution Calculations Introduction This lab involves sample calculations using various concentration units....
Chemistry 2A Lab 13: Solution Calculations Introduction This lab involves sample calculations using various concentration units. This lab will work with the following types of concentration units: % mass, % volume, % mass/volume, and molarity. A solution is the sum total of the solute and solvent. mass solute .100 % mass = mass solution volumesolute % volume 100 volume solution % mass/volume -.100 mass solute volumesolution Molarity moles solute liters solution The dilution of a liquid requires the addition of...
Hello, I need help solving the 3 parts of this question. Part - Factors affecting the...
Hello, I need help solving the 3 parts of this question.
Part - Factors affecting the dissolution process The rate at which a solute dissolves in a solvent depends on the kinetic energy of the soluton, theme of contact and the surface area of contact between the solute and the solvent particles. Both endothermic and exothermic dissolution processes will respond similarly to each factor, however the charge may be more pronounced depending on the thermodynamic penters of the reaction. As...
1a. Identify which will be hotter (have a higher final temperature) if you heat equal masses...
1a. Identify which will be hotter (have a higher final temperature) if you heat equal masses of water and aluminum, each starting at room temperature with 1.0 kJ of electrical energy. Explain your groups answer. 1b. You are holding an Al rod in one hand and an Fe rod in another. The rods have the same mass and temperature (273 K). Assuming the rate of heat transfer is the same for both, identify which one will come to your body...
Chemistry 2A Lab 13: Solution Calculations Introduction This lab involves sample calculations using various concentration units....
Chemistry 2A Lab 13: Solution Calculations Introduction This lab involves sample calculations using various concentration units. This lab will work with the following types of concentration units: % mass, % volume, % mass/volume, and molarity. A solution is the sum total of the solute and solvent. % mass= mass solute mass solution -100 volumesolute .100 % volume- volume solution % mass/volume mass solute volumesolution -100 Molarity moles solute liters solution The dilution of a liquid requires the addition of more...
7. You need to prepare 250 mL of a 0.300 M aqueous solution of sucrose, C...
7. You need to prepare 250 mL of a 0.300 M aqueous solution of sucrose, C H20 (aq), which is used frequently in biological experiments. (pts each) A. Which type of glassware should you use to make this solution (assuming that the accuracy of the concentration is important)? 250ml B. What mass of sucrose would you use? Show work C. How should the solute and solvent be mixed in the container? a. Add solute and fill solvent to 250 mark?...
Chemistry 2A Lab 13: Solution Calculations Introduction This lab involves sample calculations using various concentration units....
Chemistry 2A Lab 13: Solution Calculations Introduction This lab involves sample calculations using various concentration units. This lab will work with the following types of concentration units: % mass, % volume, % mass/volume, and molarity. A solution is the sum total of the solute and solvent. % mass= mass solute mass solution -100 volumesolute .100 % volume- volume solution % mass/volume mass solute volumesolution -100 Molarity moles solute liters solution The dilution of a liquid requires the addition of more...
10- Hess Lab Section: eriment Nine - Endo-and Exo-Thermic Reactions: Hess's Law troduction experiment, you will use a Styrofoam-cup calorimeter to measure the heat released by three rea the reactions is the same as the combination of the other two reactions. Therefore, according law, the heat of reaction of the one reaction should be equal to the sum of the heats of reaction wo. This concept is sometimes referred to as the additivity of heats of reaction. The primary ob...
UUTIIL NAME: PRE-LAB ENDOTHERMIC AND EXOTHERMIC REACTIONS. VERNIER Consider the following Data 59°C Final temperature, 1 (°C) 39°C Initial temperature, (°C) Temperature change, A/ (°C) PROCESSING THE DATA 1. Calculate the temperature change, A1, for the reaction by subtracting the initial temperature, 1, from the final temperature, 1. (Ar=1:- ). 2. Calculate the amount of heat energy, g, produced in each reaction. Use 1.03 g/mL for the density of all solutions. Use the specific heat of water, 4.18 J/(g•°C), for...
QUESTION 4
If you take a 171 mL of a 1.4 M NaCl solution and dilute it to
500 mL, what is the molarity of the final solution?
Enter the numerical answer in decimal notation
QUESTION 10
Information - Colligative
Properties
Colligative properties of solutions are those properties which
depend only on the number of dissolved solute particles in solution
not the chemical properties of the solute. For example when a
solute is dissolved in a solvent, vapor pressure
depression...
Answer the following before coming to lab: 1.) Based on what you saw last week, which enantiomer of tartaric acid would you expect to co- crystallize with (SS)-1,2-diammoniumcyclohexane? 2.) If you had a neutral aqueous solution of triethylamine, would you add acid or base in order to extract it with an organic solvent? 3.) Now, consider a dichloromethane solution of triethylamine. Would you extract with acidic aqueous or basic aqueous solution in order to get the triethylamine out of the...
Chemistry 2A Lab 13: Solution Calculations Introduction This lab involves sample calculations using various concentration units. This lab will work with the following types of concentration units: % mass, % volume, % mass/volume, and molarity. A solution is the sum total of the solute and solvent. mass solute .100 % mass = mass solution volumesolute % volume 100 volume solution % mass/volume -.100 mass solute volumesolution Molarity moles solute liters solution The dilution of a liquid requires the addition of...
Hello, I need help solving the 3 parts of this question.
Part - Factors affecting the dissolution process The rate at which a solute dissolves in a solvent depends on the kinetic energy of the soluton, theme of contact and the surface area of contact between the solute and the solvent particles. Both endothermic and exothermic dissolution processes will respond similarly to each factor, however the charge may be more pronounced depending on the thermodynamic penters of the reaction. As...
Chemistry 2A Lab 13: Solution Calculations Introduction This lab involves sample calculations using various concentration units. This lab will work with the following types of concentration units: % mass, % volume, % mass/volume, and molarity. A solution is the sum total of the solute and solvent. % mass= mass solute mass solution -100 volumesolute .100 % volume- volume solution % mass/volume mass solute volumesolution -100 Molarity moles solute liters solution The dilution of a liquid requires the addition of more...
7. You need to prepare 250 mL of a 0.300 M aqueous solution of sucrose, C H20 (aq), which is used frequently in biological experiments. (pts each) A. Which type of glassware should you use to make this solution (assuming that the accuracy of the concentration is important)? 250ml B. What mass of sucrose would you use? Show work C. How should the solute and solvent be mixed in the container? a. Add solute and fill solvent to 250 mark?...
Chemistry 2A Lab 13: Solution Calculations Introduction This lab involves sample calculations using various concentration units. This lab will work with the following types of concentration units: % mass, % volume, % mass/volume, and molarity. A solution is the sum total of the solute and solvent. % mass= mass solute mass solution -100 volumesolute .100 % volume- volume solution % mass/volume mass solute volumesolution -100 Molarity moles solute liters solution The dilution of a liquid requires the addition of more...
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