Lab 2 General Chemistry Lab Safety Experiment 1: Neutralization of Acids and Bas
ID: 714460 • Letter: L
Question
Lab 2 General Chemistry Lab Safety Experiment 1: Neutralization of Acids and Bases In this experiment, you will learn how to properly neutralize and dispose of acidic and basic solutions. Materials 5 mL 4.5% Acetic Acid (vinegar), C2H402 (1) 250 mL Beaker (1) 10 mL Graduated Cylinder (1) 100 mL Graduated Cylinder 8 pH Paper Strips pH Paper Color Reference Chart 2 Pipettes 0.5 g Sodium Bicarbonate (baking soda), NaHCO 2 Weigh Boats *Camera/Smart phone is sufficient Distilled Water Pen or Pencil Permanent Marker "You Must Provide Procedure 1. Use the permanent marker to label two of the weigh boats as "A" and "C." 2. Use the permanent marker to label a 250 mL beaker as "B. 3. Set the containers in the order A, B, and C. 4. Use your 10 mL graduated cylinder to measure and pour 5 mL of water into weighExplanation / Answer
1. A situation when you use concentrated acid or base. In these situations you need to neutralize solution before discarding. Concentrated acid or base is harmful. You can neutralize the acid with base and vice versa. While neutralizing you can use pH paper to make sure that the pH of the solution is near to 7 (neutral pH). When the pH is near to 7 you discard it.
2. You should always add acid to water. Never add water to acid. Diluting acid with water is an exothermic process. That means heat will be released during the process. If you are adding acid to water the solution forms is very dilute. And the heat forms not enough to vaporize the solution. But if you add water to acid large amount heat forms and temperature of the solution increases. The sudden increase of heat results in violet boiling of the solution. Solution will come out from the container and it can harm the person who is doing the experiment.
3. To answer this question check the readings you have got from the experiment.
4. If the bicarbonate solution was stronger then you require more amount of acetic acid to neutralize the solution. Neutralization reaction of sodium bicarbonate with acetic acid is given below.
NaHCO3 + CH3COOH CH3COONa + H2O + CO2
Each molecule of sodium bicarbonate reacts with one molecule of acetic acid to form sodium acetate (salt), water and carbon dioxide. If the concentration of sodium bicarbonate is more then you require more of acetic acid as well to neutralize. In the same way if sodium bicarbonate is less concentrated you require less amount of acetic acid as well.
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