Explain that they are to write name of liquid next to the number which corresponds to the tested result. Pour ounces of lemon juice into the appropriately labeled cup. Is water acidic, basic, or neutral? The homework provides an evaluation of the testing procedure and transfer to real life setting.
The concepts of pH level and the pH scale are essential. Provide each group a pH color testing guide and 15 sections of pH testing strip. Discard Q-tip and used strip in container provided at that station.
If guided activity, review properties of acids and bases; and the uses of each. Each group will be assigned a station and when told will move to the next moving from lower to higher numbered station.
Conclude with students cleaning up the station at which they finish. Pour ounces of milk into the appropriately labeled cup. Specific directions for rotating through the stations is helpful for classroom management.
Implementation of any Science Project Idea should be undertaken only in appropriate settings and with appropriate parental or other supervision. They are to test a minimum of four additional and different liquids in their home and record the pH of each.
Assign students a lab partner and place students in groups of 2. Assessment The lab is assessed as indicated above. Students analyze data by comparing the similarities and differences of liquids next to each other on the scale and those which are farther apart.
Students receive a second lab sheet and a length of pH testing strip with scale.
What is the range of acidic levels? It is beneficial to have another adult in the classroom with a class over 20 students. Previous to teaching with this activity, acids and bases were taught with overheads, large pH scale and reading the textbook.
Give specific directions for the saliva test. What pH level does water have? On occasion liquids were tested simply for acidity or basicity, which did not show the continuum of pH nor allow comparisons.
Teaching Notes and Tips Safety rules must be emphasized for this lab. Dispose of acids and bases in separate containers or at separate sinks. Reading and following the safety precautions of all materials used in a project is the sole responsibility of each individual.
What is the most basic level? Discuss uses of liquids and liquids How do you measure pH? Place one eye dropper at each station if using Student preparation and procedure: Explain the characteristics of liquids which tested 7.
Provide paper toweling at each station 6. Adjust number of stations for shorter class periods. Each student is to test their own saliva by swabbing the inside of their mouth with a clean Q-tip and test it by touching the Q-tip to an un-used pH testing strip. Students record observations and discussion notes on reverse of lab sheet.
Pour ounces of water into the appropriately labeled cup. Contamination of strips occurs when students touch the area used to test liquid creating a testing error.
Students are to complete 15 stations. What is the scale pH is measured on? Arrange liquids to be tested at 14 stations 4. Pour ounces of window cleaner solution into the appropriately labeled cup. Using the appropriately labeled cup, measure 1 teaspoon of baking soda and mix with several ounces of water.
What is the range of basic levels? Warning is hereby given that not all Project Ideas are appropriate for all individuals or in all circumstances.Mar 16, · The goal of this science fair project is to assess the acidity levels of common food and household products using pH test strips.
Guided Lessons Learning Resources Teaching Tools. Testing pH Levels in Everyday Foods and Household Products. Science Project. Measuring /5(72). Another way to measure pH is by using a pH meter. These meters work by measuring the amount of hydrogen ions in a solution.
Prelab: Understanding the pH scale.
1. Examine the pH scale given to you. This allows you to measure the pH of solutions. Determining the pH of Common Household Items. Nov 10, · October The purpose of these guidelines is to assist manufacturers in determining the metric equivalent declarations (e.g., gram (g) and milliliter (mL) measures) of the common household.
Aug 05, · How to Measure the pH of Water. Testing the pH of water tells you how acidic or basic the water is at the moment of testing. Pure water should have a pH of 7, though common tap water has a pH between 6 and Highly acidic water (water with a low pH) is more likely to dissolve toxic chemicals.
Cookies make wikiHow better. By 88%(26). CAT - Measuring the pH of common household substances 1. Predict the pH value of substances & estimate the pH value by using the universal indicator. Context for Use: Investigating pH of common household substances is designed for a 6th grade middle school classroom.
The activity is conducted as a lab with emphasis on prior determined safety rules.Download