Hard water has a high concentration of cat ions and and ions. ... Prior understanding of water hardness may allow for saving money in the future by installing a water softening system. ... Water hardness can be determined by many techniques. ... A red color appears in each individual well due to a chemical reaction between the EBT and the magnesium. ... After precipitation occurs, the water can be filtered, resulting in soft water. ...
Once plated with zinc, the penny was removed using tongs and placed in a beaker of water to clean. ... Using the tongs, each side of the penny was placed in the flame of the burner for several seconds and then the penny was put back in the water. ... Results The surface of the penny that was in contact with the zinc filings changed from light brown in color to silver in color. ... Instead, they changed from light brown or copper in color to silver and gold in color. ... The penny turned from silver in color to gold in color while the penny was in the burner flame. ...
It then changes color when this happens. This color change is called the "end point" of the titration. ... To each sample about 100-mL of distilled water was added and swirled to dissolve the salt. ... The color change (light pink) showed when this happens. This color change was the "end point" of the titration. ...
Materials 1% Sucrose (1g/99ml of distilled water) Buffers (pH 1.0, 4.4, 9.2, 13.0) Sucrase (1 packet yeast to 500ml distilled water) Ice Bath and Warm Water Bath Test Tube Rack Test Tubes Pipette Beaker Test Tube Clamps Benedict's Solution Thermometer Distilled Water Marker Hot Plate III. ... To this was added our enzyme sucrase and water. In test tube 1 there was no sucrase and 3.0ml of water, used as our control, tube 2 had 0.5 ml of sucrase and 2.5ml of water, tube 3 had 1.0ml of sucrase and 2.0ml of water, tube 4 had 1.5ml of sucrase and 1.5ml of water, and finally...
Materials: test tubes, 13x100-mm(4) pipet dropper test tube rack safety glasses .1 M solutions of: Hexanes NaF 3.0M NH3(aq) NaCl chlorine water NaBr NaI Ca(NO3)2 AgNO3 Procedure: Part I 1. ... Then add chlorine water. 10. ... NaF + Ca(NO3)2: Cloudy color NaCl + Ca(NO3)2: NR NaBr + Ca(NO3)2:NR NaI + Ca(NO3)2:NR 3. ... There were two layers in the aqueous solutions because hexanes and water are immiscible. ...
Acids which are not combined with water are dangerous - they change so fast that they can react with skin and cause burns. Bases are bitter, water-soluble substances which are also very useful. ... The solutions they form with water are called basic solutions. ... Other characteristics to watch for when mixing two or more substances are heat and light, flames, explosion, color change, and evolution of gas. ... You need water to help it show. ...
Introduction The periodic table currently contains over 100 different elements that are known to this universe. Each element exhibits both chemical and physical properties which make them unique from one another. To get a closer look of things, everyone used a spectroscope to examine the patterns a...
