Luster is a property of a mineral that tells how the mineral reflects light. Luster gives you an indication of how "Shiny" a mineral is. The two main ways that geologists categorize a mineral's luster is Metallic and Non-metallic. The luster of a mineral may differ from sample to sample.
Make each strip at least one inch longer than the height of your large jar. To get approximately one eighth teaspoon you can fill a one quarter teaspoon measuring spoon so that it is half full. Pour a small amount of the salt solution into a large jar with a narrow opening so that the jar is about one inch full.
Leave it there for another three minutes. Then remove the candy. Do you see the dye soak into the strip, coloring the area around the line? You can get some extra dye on the line by dabbing the sides of the wet candy with it. Put a small drop of food coloring on the plate and lightly dab the line on a new strip against it.
Repeat this so that you have three food coloring strips one each for the red, green and blue food coloring. Put the strip into the jar until the strip just touches the saltwater. Drape the top of the strip over the jar's opening and secure it with a clothespin.
Make sure that each strip is not touching the jar's sides but only contacts the jar where it is secured. Place and secure as many of the other strips as will fit in the jar, being sure that they do not touch the jar's sides or each other.
Remove the strips at this point. This may take around 10 minutes. What has happened to the colors on the strips? Keep a close eye on the strips and where the water is—if you let the strips run too long, the water can reach the top of the strips and distort your results. You can set them on a drying rack, or on the clothespins laid flat to do this.
Do your results make sense to you? A more accurate way to identify colored components in a solution using paper chromatography is by determining their retention factor Rf value.
The Rf value is the ratio between how far the component travels and the distance the mobile phase solvent travels from a common starting point the line you drew on the strips. If other conditions are kept the same, the Rf value for a certain component should be consistent.
You can do this activity again but this time measure these distances and calculate the Rf value for each component.
What about their other colors? You could try this activity again, but this time compare using different kinds of mobile phases for example, saltwater, water, vegetable oil, isopropyl rubbing alcohol, etcetera.brinell hardness test lab report theory briggs and stratton repair manualmodel mastering physics chapter 4 solutions lesson 44 practice b answers algebra 2 lanternfish esl water cycle answer key labpaq lab answers level 5 logo quiz answers.
Because two of the trials showed results of ppm and one had the result of ppm, this indicates that the actual hardness of the water was closer to ppm. The hardness of water is structured by a numerical range.
Soft water has a ppm between 0 and Moderately hard has a range of Hard is between and Solution Science: Colorful Candy Chromatography. A chemistry challenge from Science Buddies. By Science Buddies on April 4, ; The water is absorbed into the fibers of the paper. As the. Complexometric determination of water hardness Complexometric Determination of Water Hardness 9/12/ Abstract: Two sets of acid-base neutralization titrations were conducted for experimental analysis.
The first set of titrations was to standardize a solution manufactured in the lab.
Chapter A6. Field Measurements Turbidity, Version (9/) TBY—1 TURBIDITY By. Chauncey W. Anderson. selectin g appropriate field and laboratory instruments and procedures bubbles or gases in the water can cause apparent turbidity (positive bias), and might require special sample preparation or handling to.
Essay Hard Water Lab Report. Lab Report: Hard Water Purpose: The purpose of this lab is to determine whether a liquid is hard water or not.
Background: Hard water is the water that has a high amount of mineral in it, usually Ca2+ and Mg+.