pH stands for Potential of Hydrogen. pH Item Approx. ... but for our purposes we can just consider acids and bases as opposites, and think of pH as a scale or ruler, with acids at the low end (numbers between 0-6) and bases at the high end (number typically between 8-14). We refer to cabbage juice as a pH indicator because it can tell us if a substance is acidic or basic by changing colour. Prunes 3.63-3.92 PRELAB QUESTIONS (homework 12/12): What is pH a measure of exactly? Potatoes 5.40-5.90 Mint jelly . When you begin to test the pH of other liquids, the juice will change different colors if it is mixed with an acid or a base. 2 . The lower the number on the pH scale, the more acidic something is. Maple syrup . Other pH indicators are litmus paper and phenolphthalein. There are natural pH indicators such red cabbage juice, which will change its color when subjected to an acid or a base. Place the chopped cabbage into the pan and cover with water. Q8. A solution with a pH between 5 and 7 is neutral, 8 or higher is a … Pour 1Tbsp of cabbage juice into each of the cups, swirling gently. Write down what color each solution turns the cabbage juice, based on the following pH scale. Potential of hydrogen, otherwise known as pH, measures the levels of acid and alkaline in a substance on a scale from 0 to 14. How does the color of cabbage juice change as it is exposed to increasing acids or bases? 6. 3.01 . • In another small, white paper cup, add one tablespoon of your original cabbage-indicator solution. Cabbage Juice pH Chemistry Lab. Different substances to test – baking soda, vinegar, lemon juice and lime juice all work well. • Based on its color, what is the pH of the lemon or lime juice solution? Match the colors you get while you are testing liquids to the chart below to see what pH you have. Learn More: Purple cabbage juice is a pH indicator, or a substance that changes color when it’s mixed with an acid or base. Gardeners also use a battery-powered pH meter to measure the pH of the soil. Item Approx. The cabbage contains a natural pH indicator that changes colors according to the acidity of the solution. Because red cabbage has this indicator pigment, it is possible to determine the pH of a solution based on the color it turns the red cabbage juice. Summary. acids turn the cabbage juice red, while bases turn the cabbage juice green. 5.15 . A high pH indicates higher alkaline content, and a low pH signals higher acidity. Liquid: Color Predicted pH Actual pH Water Lemon Juice Baking Soda Shampoo Glass Cleaner (Ammonia) Milk of Magnesia Warhead Spray / … ... pH scale measures concentration of H+ in a substance and a pOH scale measures the concentration of OH- in a substance. In this experiment, we will use the juice from red cabbage as a pH indicator to test common household liquids and determine their pH levels. The pH scale measures how acidic or alkaline a substance is. Simmer for 10 minutes. red cabbage juice, the liquid should be this color. Below is a pH scale with some common household items listed on it. In this project, you’ll test different substances in purple cabbage juice and compare the results to a printable pH scale. pH . 6.00-6.67 . The pH of a solution is a numerical measure of how basic or acidic it is. It is a scale of acidity or basicity by the concentration by the H+ ions. Vocabulary: Acid: Acids create H 3 O + ions when in contact with water (for simplicity sometimes called H +). Pomegranate 2.93-3.20 Melon, Honey dew . Sieve the water and cabbage into a jug – you will notice that the cabbage liquid is very purple in colour. The pH of pure water is 7 and the normal range of surface water is between 6.5 and 8.5. Method. Leave to cool for about 30 minutes. pH scale for Red Cabbage Juice pH 1-2 3-4 5-6 7-8 9-10 11-12 The goal of today’s activity is to first identify the unique colors of the red cabbage juice at different pH levels.