Acids, Bases, and Salts

Better Essays
Experiment #7: Acids, Bases and Salts
Mabag, Viannery D., Mangune, Paolo D.
Chem 14.1, MAB1, Ms. Angelyn del Rosario
March 8, 2010

I. Abstract The experiment allowed students to explore different electrolytes and classify them into acids, bases and salts by using different indicators or by measuring the pH levels of each. The experiment also helped students classify different substances through their conductivity properties. The preparation of a 1 M stock solution from NaOH pellets diluted to a 0.1 M NaOH solution was also utilized in making the students understand the concept of titration. Using 0.1 M NaOH as a standard solution, the concentration of an unknown acid was calculated from the endpoint of an acid-base titration.

II. Keywords: acid, base, salt, pH, electrolytes, conductivity, titration

III. Introduction The experiment made the students classify substances as acids, bases, and salts using different indicators; identify pH; classify electrolytes as weak or strong based on conductivity; prepare 1 M NaOH from NaOH pellets; prepare 0.1 M NaOH from 1 M NaOH; determine endpoint of an acid-base titration; and calculate the concentration of an unknown acid solution based from titration data. Electrolytes are substances that dissociate into ions when dissolved in water. They are classifiable into acids, bases and salts using different indicators. An acid releases hydrogen ions, donates protons and accepts electron pairs. It is usually sour in taste and reacts vigorously with most metals. It also changes blue litmus paper to red. Moreover, it has a pH less than 7 and can be used to neutralize bases. A base, on the other hand, releases hydroxyl ions, accepts protons and donates electron pairs. It usually has a bitter taste and is nonreactive to metals. It has a pH more than 7 and changes red litmus paper to blue and can be used to neutralize acids. Salts result from the neutralization of an acid with a base. There are different indicators used to



References: Chang, R. (1998). Chemistry 6th ed. USA: McGraw-Hill Brown, T., et. al. (2003). Chemistry the central science 9th ed. Phils: PESA Ltd. Brown, T. Chemistry: The Central Science, Eight Edition. Prentice-Hall, Inc., 2002. I hereby certify that I have given substantial contribution to this report. VIANNERY D. MABAG PAOLO D. MANGUNE

You May Also Find These Documents Helpful

  • Satisfactory Essays

    Every solution has either has an acid or basic trait. The acid or basic trait in a solution are called pH level. pH is a scale that is used to determine if solution is acidic ,basic, or neutral. During Living Environment class, we conducted a experiment that allowed us to measure the pH levels of 3 solutions. We were split into groups and each person had to bring a household solution from around the house.…

    • 315 Words
    • 2 Pages
    Satisfactory Essays
  • Powerful Essays

    The purpose of the current experiment was to determine the pH of various hydrochloric acid and acetic acid solutions, to determine the pH of various salt solutions, to prepare a buffer solution, and determine the effects of adding a strong acid and strong base to the buffer solution versus adding a strong acid and strong base to water. The measured pHs for the hydrochloric acid solutions were 1.6, 2.2, 2.9, and 3.8. The measured pHs for the acetic acid solutions were 2.9, 3.9, 4.2, and 4.4. The pHs measured for the salts were 4.3 for sodium chloride, 7.3 for sodium acetate, 8.9 for sodium bicarbonate, 10.8 for sodium carbonate, 7.9 for ammonium chloride, and 6.9 for ammonium acetate. The pH for the buffer solution and the strong acid was 3.9 and the pH for the buffer solution and the strong base was 11.6. The pH of water with the strong acid added was 3.44 and the pH of water with the strong base added was 13.4…

    • 1669 Words
    • 6 Pages
    Powerful Essays
  • Good Essays

    INT Task 3

    • 1084 Words
    • 5 Pages

    In this paper I will be addressing how to tell an acid from a base using a simple experiment that can be done in the household. Telling an acid from a base is very important in the world from people that may have a pool in their backyard to those who are chemists and need that information to balance chemical equations. With simple experiments, one can tell if the solution they have is a base or an acid.…

    • 1084 Words
    • 5 Pages
    Good Essays
  • Good Essays

    Chm 130 Lab 12

    • 1003 Words
    • 6 Pages

    In this experiment the students will be determining the pH of household products along with other solutions using several different indicators as well as a pH meter. The experiment also has the student determining what the buffer solution is in an aqueous solution. The student will also be testing the pH of milk of magnesia and will see how it affects the stomach acid. Lastly the student will be using the carbon dioxide found in their breath to neutralize a base.…

    • 1003 Words
    • 6 Pages
    Good Essays
  • Powerful Essays

    Acids and Bases

    • 2330 Words
    • 10 Pages

    ABSTRACT: The concentration of sodium hydroxide was determined by colorimetric titration, and the identity of an unknown acid was determined by potentiometric titration. In the first titration, a strong acid standard, potassium hydrogen phthalate (KHP), was used, to determine the concentration of a strong base, sodium hydroxide (NaOH). In order to do so, we prepared NaOH solution, prepared a buret, and standardized this solution by performing a colorimetric titration of the KHP with the solution until a color change was present. The color change was introduced by an indicator known as phenolphthalein, which caused the solution to go from colorless to pink, which marked the endpoint of this titration. As a result, the concentration of the NaOH solution was found to be 0.124 M with a standard deviation of 0.004 M. In the second titration, the goal was to use both an acid’s formula weight and acid dissociation equilibrium constant (pKa) value to determine the identity of this unknown acid. Both values were found by preparing the unknown acid solution, preparing a buret, titrating the acid solution with the strong basic NaOH solution from the previous experiment, and determining the pH at various points using the pH meter. The formula weight of our unknown acid was found to be189.93 g and the pKa was 7.2 and 7.05 using two different methods. We were able to conclude that our proposed identity of our unknown acid was MOPS, which had a formula weight of 209.26 g and pKa of 7.2.…

    • 2330 Words
    • 10 Pages
    Powerful Essays
  • Powerful Essays

    The purpose of the experiment was to utilize the techniques of titrations to measure the concentration of an acid or base in solution, to calculate molar mass of an unknown acid or base, and to determine the equilibrium constant of a weak acid or weak base.…

    • 2054 Words
    • 9 Pages
    Powerful Essays
  • Powerful Essays

    Objective: This lab focuses on the detection of ions using titration as an analysis tool. You will standardize NaOH and HCl solutions so that you know the exact concentration and then prepare samples of common household items in order to determine the amount of calcium in Tang®, Mg(OH)2 in Milk of Magnesia, etc. You will learn to prepare samples of a specified concentration, learn about acids and bases through the use of titrations and learn how to detect endpoints using different indicators. You will become adept at measuring pH with both a pH meter and indicator paper. You will then conduct quality control testers and determine if the label on a bottle of over-the-counter product actually contains the percentage of compound that it advertises.…

    • 2749 Words
    • 10 Pages
    Powerful Essays
  • Satisfactory Essays

    1. Test: Use the Gizmo to find the pH of each of the available substances. Classify…

    • 787 Words
    • 6 Pages
    Satisfactory Essays
  • Satisfactory Essays

    Lab 5 Acid Base Chemistry 2

    • 1240 Words
    • 17 Pages

    No credit will be given for this lab report if the Data section is not completely filled out and if the required photographs are not received. At least one photograph must show the student’s face.…

    • 1240 Words
    • 17 Pages
    Satisfactory Essays
  • Better Essays

    Homeostasis is the tendency of a system, especially the physiological system of higher animals, to maintain internal stability, owing to the coordinated response of its parts to any situation or stimulus that would tend to disturb its normal condition or function. This is essential for the human life. Every piece of this experiment was to prove the slightest change can through your body off balance.…

    • 1777 Words
    • 8 Pages
    Better Essays
  • Better Essays

    In this experiment the factors of concentration and pH were tested. The tests performed were done so in order to investigate the effects of pH and concentration difference on the overall…

    • 1388 Words
    • 6 Pages
    Better Essays
  • Good Essays

    Unknown Acid Titration

    • 1249 Words
    • 5 Pages

    The concentration of one solution was determined by its reaction with a standard solution. The molar mass of unknown acids were also calculated. While learning to titrate, I learned several other skills in the process. I learned how to prepare a standard solution of sodium hydroxide, how to standardize a sodium hydroxide solution by using potassium hydrogen phthalate (KHP), how to find the molar masses of unknown organic acids when given whether the acid is monoprotic, diprotic, or triprotic, and how to calculate the molarity of a soft drink. At the same time, other skills were practiced. Skills such as calculating molarity, molar mass and percent error were exercised.…

    • 1249 Words
    • 5 Pages
    Good Essays
  • Good Essays

    Acid Lab

    • 439 Words
    • 2 Pages

    In this lab the testing of whether or not a substance was an acid or a base occurred. Each substance was tested with the indicators red litmus paper, blue litmus paper, pH paper, phenolthalein, bromthymol blue, and phenol red. While the substances were tested the group noticed that the substances tested with the red and blue litmus paper, the phenolthatein, bronthmol blue were the easiest to interpret. The color changes that occurred when this indicator was put into a substance made it really obvious whether or not the substance was an acid or a base. Especially, the magenta color that the phenolthalein turned in the presence of a base really made the substance easy to interpret.…

    • 439 Words
    • 2 Pages
    Good Essays
  • Powerful Essays

    Buffers Essay

    • 2060 Words
    • 9 Pages

    The main objective of this lab was to test the ability of buffered and unbuffered solutions to resist changes in pH with the addition of strong acids and strong acid. This will be accomplished by making two sets of five different solutions. They will be made using water, a salt solution (sodium chloride), and various concentrations of a buffer. Once the solutions are made, one set of the five will be used to observe the changes in pH made by adding hydrochloric acid (HCl) drop by drop. The second set of the five solutions will be used to observe the changes in pH made by adding sodium hydroxide (NaOH) drop by drop.…

    • 2060 Words
    • 9 Pages
    Powerful Essays
  • Better Essays

    Biology Lab Write up

    • 1066 Words
    • 5 Pages

    In this experiment we used a Vernier computer interface to calculate the pH change of each substance we were given to see which one it effected the most and least. In a 250-mL beaker we filled it up with about 100-mL of distilled water to keep the pH electrode from drying out. Before starting out the lab, we had to obtain gloves and eye ware to keep the acids and bases from contacting sensitive parts of the body. We then labeled our 50-mL beaker “basic”, because we were assigned a base. After labeling it basic, we then placed 20-mL of distilled water in the beaker. The pH should stay the same of the distilled…

    • 1066 Words
    • 5 Pages
    Better Essays

Related Topics