Chemistry > CASE STUDY > CHEM-120 Unit 4 Lab: OL Lab 8: Acids and Bases (GRADED) (All)

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CHEM-120 Unit 4 Lab: OL Lab 8: Acids and Bases (GRADED)

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OL Lab 8: Acids and Bases Part 2: Report and Reflection Purpose: Describe in complete sentences and in your own words, the purpose of this experiment. The purpose of this experiment is to learn the fundamentals of acids and bases and the ways they can be characterized and used in the lab. Seeing how two compounds touching can be acidic or basic. Observations: Record three observations from the simulation. Acids are proton donors and bases accepts protons, the Bronsted-Lowry definition. Water molecules self-ionize, which results in a constant level of hydronium ions, even if there is no acid added to the water. Most acids and base solutions have a pH in the range pf 1 to 14. A pH of 1 means there is 1 mole of H+ per liter. Answer the questions below 1. In your own words, describe how to determine which substance acts an acid and which substance acts as a base in the forward direction of the following reaction: H2S + H2O ⇌ H3O+ + HS- The reactant will always contain an acid and a base. The product will always contain a conjugate acid and a conjugate base. The H2S is the acid because it donated an H. H2O is the base because it accepted the H. 2. Predict the two products of the following neutralization reaction and label each product using acid/base terminology: HCl + RbOH → H2O + RbCl 3. In your own words, describe the relationship between proton (H+) concentration, and pH. (2 points) The relationship between proton H+ and pH is the proton combining with a water molecule to form a hydrogen ion. The number of hydrogen ions is a direct measure of how basic or acidic a solution is. 4. Reflection: Consider what you learned from this simulation. Reflect on three to four key concepts that you learned in this lab exercise. How could the lessons learned in this virtual lab related to a real world situation in the community/world or your future career? Be specific in your answer (this should require 5-10 sentences). When handling acids and bases, one must always take precautionary measures and wear safety goggles and gloves. The chemicals are highly hazardous and corrosive. It’s the chemical structure that determines the acidity of a substance. Water holds the record for being the most common acid on our planet, but it is also the most common base. Water can both accept a proton and donate one, amphoteric nature of water. Grading Rubric: Activity Deliverable Points Labster Lab Complete simulation and answer all questions 9 Document Submission Complete lab report and answer questions • Observation (3 points) • Purpose (1 point) • Questions (3 points) • Reflection (2 points) 9 Total Complete all lab activities 18

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