Litmus paper will turn red if it comes in contact with an acid (a substance with ph between 0 and 7) and blue if it comes in contact with a base (a substance with ph between 7 and 14) we will work with two types of litmus paper, blue and red. An indicator changes color when it encounters an acid or base there are many different types of indicators, some that are liquids and others that are concentrated on little strips of litmus paper. Take any acid – we used lemon juice and vinegar – and a base, the handiest being baking soda, add a small quantity to each purple pool of indicator, and observe the results the acids will immediately turn the cabbage juice pinkish-purple, while the base will make the juice greenish-blue. The ph runs from 0 (strongly acidic) through 7 (neutral) to 14 (strongly alkaline) salts are made when acids and bases react together the particular salt made depends upon the acid and base used. Acid and base litmus results essay procedure litmus paper is a paper that can indicate the level of acid or base of some substances litmus paper usually made from absorbing paper that contains red cabbage essence litmus paper is commonly used in school and university laboratory below are the steps how to.
The presence of acid causes litmus to turn red while the presence of base (alkali) turns litmus blue litmus paper vs ph paper since litmus paper gives inexact results around neutral ph 7 one has to consider the alternatives if this range is important. Acids, bases and salts: acids, bases and salts we use red litmus if we want to test a substance for alkalinity its results are: acids: turns blue litmus paper/ solution red, bases: turns red litmus paper/ solution blue, this is a method to make a neutralization reaction between a base and an acid producing a salt without any excess. 10 different ph/litmus test papers for you to get the reliable results you need view more ph test strips for acid and/or alkaline solutions with 05 or 10 ph unit resolution.
Color in the presence of an acid or a base in general, litmus paper turns from blue to red in the presence of an acid and from red to blue in the presence of a base 8 definition: the chemical reaction between an acid and a base that results in both substances. Properties of acids and bases) hand sanitizer acidic neutral basic lemon soda acidic neutral basic apple juice acidic neutral basic categorize your results below: strong acids weak acids neutral weak bases strong bases now add 10 tablespoons more of baking soda into a new cup. Wondering what to do with litmus paper don't write on it, but instead drop a drop of solution on both red and blue litmus paper in order to determine the ph.
So, ph paper has a neutral range where it won't react to weak acids or bases look up what that range is then to find the ph of an acid, and dilute it drop by drop with water until it becomes too dilute to turn blue litmus paper red. Practice test: acids & bases the results of testing a colorless solution with (d) c 12h 22o 11(aq) ____42 a solution with a ph of 11 is first tested with phenolphthalein and then with litmus what is the color of each indicator in this solution (a) phenolphthalein is colorless and litmus is blue. The titration of a weak acid with a strong base (or of a weak base with a strong acid) is somewhat more complicated than that just discussed, but it follows the same general principles let us consider the titration of 250 ml of 0100 m acetic acid (a weak acid) with 0100 m sodium hydroxide and compare the titration curve with that of the. Experiment 1: neutralization of acids and bases data tables and post-lab assessment container chemical contents litmus results additional observations a b c table 2: initial litmus test results table 3: neutralization amount of acid litmus result 1 ml 2 ml 3 ml 4 ml 5 ml ©escience labs, llc 2014.
Bases, compare ph and litmus paper as it relates to the test results list the “big idea” conceptual questions that the teacher will ask to focus the student exploration. Using litmus paper to test acids and bases introduction litmus paper is commonly used to determine if a solution is acidic or basic follow this simple procedure to determine the 4 observe the color change, if any, and record results 5 repeat steps 3 and 4 using litmus red test paper using litmus paper to test acids and bases. Acids turn blue litmus paper red, and bases turn red litmus paper blue the following video shows how red and blue litmus paper reacts to ammonia, hydrochloric acid, water, and baking soda strong acids have a corrosive effect on metals. Neutralization of an acid (table 3) amount of base litmus results 1 ml the paper stayed red 2 ml the paper still was red 3 ml the paper began to have a blue tint to it 4 ml the paper slowly tuned blue 5 ml the paper turned blue post-lab questions 1 state your hypothesis (developed in step 8) here be sure to include what you think the ph. Fernanda bishop table 2: initial litmus test results weigh boat chemical contents red litmus results additional observations a water purple – neutral b water + bicarbonate blue - base c acetic acid red - acid table 3: neutralization of an acid amount of base blue litmus result 1 ml acid 2 ml acid 3 ml acid 4 ml acid with a little portion of.
Acid and base litmus results essay weight boat chemical contents litmus results additional observations a 5ml of water the litmus paper didn’t really change it stayed a purple color the paper seemed to stay a purple color. From: elivia kipe the six substances tested are shown above the picture to the left shows q-tips that have been colored as a result of being dipped in an acidic or basic solution acid base litmus paper turns red when it is an acid, as shown. How to do a litmus test performing a litmus test is one of the oldest and simplest methods of determining the acidity or alkalinity of a solution analyze the results use the data to determine if the gas is an acid, a base, or neutral base - red paper turns blue blue paper does not change acid - blue paper turns red red paper does. Test each of the solutions with red and blue litmus paper to determine if the solution is an acid, base, or neutral use the forceps to dip the litmus paper after you dip it, place the litmus paper on the paper towel.
Lab report: acids and bases group 220 such as red cabbage or litmus paper, then there will be a change of color, in the mixture in the case of the red cabbage, or in the paper in the case of the litmus paper, depending if the substance is an acid or a base, because the function of a ph indicator is to differentiate between acids and bases. Acid-base indicators on litmus owe their properties to a 7-hydroxyphenoxazone chromophore some fractions of litmus were given specific names including erythrolitmin (or erythrolein), azolitmin, spaniolitmin, leucoorcein, and leucazolitmin azolitmin shows nearly the same effect as litmus. Measuring ph with litmus paper nearly everything around is an acid or a base, with the exception of water water is neither acidic nor basic, but rather neutral.
Acids and bases interact with each other in what is called a neutralization reaction the products of the reaction are a salt and water the ph is neutralized to 7 if both the acid and base fully react sour taste, corrosive, change litmus from red to blue sour taste, corrosive, change litmus from. Properties of acids and bases there are many different kinds of indicators litmus paper and phenolphthalein use your results from steps 24 as well as the background section on indicators to classify each of the 6 solutions as acidic, basic, or neutral. Litmus paper is handy as a general acid-base indicator, but you can get much more specific results if you use an indicator that has a more narrow test range or that offers a wider color range.