Solubility Lab Report

The objective of the experiment “Keeping it Liquid” was to figure out what it takes to keep a compound in a liquid form which caused a phase change. A phase change is when a substance changes from one state or phase to another. There are three main phases that normally occur and they are called Evaporation, Deposition, and Melting. Evaporation is where a liquid changes to a gas. An example of evaporation is when water drops form on the glass of a cold drink on a warm day. Deposition is where a gas vapor goes directly into the solid phase without becoming a liquid first. An example of Deposition often occurs on windows during the winter months. While Melting is where a solid turns into a liquid. Melting occurs when ice turn into a liquid when

In this lab we tested how changing the content of the water affects the speed of the alka seltzer dissolving. My hypothesis was that the tap water would dissolve the tablet fastest, the salt water would be second fastest, and the sugar water would be the slowest. I was correct that the tap water would dissolve the fastest, but I was wrong in that the salt water would dissolve faster than the sugar water. I think that our results came out the way they did because of the amount of sugar and salt we put into the water. When we put the sugar and salt into the beakers, we came up with those measurements on the spot. After the salt and sugar had been added, the salt water was very cloudy, but you could barely tell the tap water from the sugar water.

c) Record the amount of substance that dissolved – all, some, a little, or none.

Moisten filter paper with a few drops of solvent and turn on water vacuum to fullest extent

Temperature is known as one of the factors that affect the solubility of a gas in its solvent. Because the enthalpy of solution for gases dissolved in waters is usually

21) After all of the solid dissolves, move the flask from the hot plate and allow it cool to room temperature. After a while, crystals should appear in the flask.

If one had weighed out precisely 0.500 g of KIO3 for the primary standard solution and dissolved it in enough

How does the dissolve rate of the Alka-Seltzer tablets change as the temperature of the water changes? The dissolve rate is being affected by the temperature of the water. Temperature is a measure of kinetic energy in molecules (NYU). The higher the temperature, the higher the kinetic energy. Energy is required to create a reaction. Molecules with more energy come into contact with each other more often. The molecules of the reactants have to come into contact with each other, so more energy in molecules result in faster dissolving time.

his brother Mark was having difficulties in chemistry, especially with understanding what dissolved,solute,aqueous and solvent meant. He sat down with Mark after saying hi to the family, and told him that when a substance is dissolved it’s when the molecules of solute are completely separated in a solution,that the solvent will always be the liquid and solute what we are dissolving in it, and that aqueous is simply water.

3.6.3. 2, 4 – D (2, 4–Dichloro phenoxy acetic acid) stock solution (1mg/ml): 10.0mg of 2.4-D being weighed and dissolved completely in 1N NaOH to a final total volume

As the temperature of water increases, the particles of solid Potassium chloride, KCl, which are absorbing energy from its surrounding, start moving more easily between the solution and its solid state because. According to the second law of thermodynamics, the particles will shift to the more disordered, more highly dispersed solution state. I predict that as the temperature of a KCl and water mixture increases, then the solubility of the KCl will also increase.

Determine how many grams of Copper Sulfate Pentahydrate you will need for your 100 mL of Water using the solubility curve. (See solubility curve)

1. 10 drops of 1 M K2CrO4 was added to the solution and stirred for about 10 minutes.

3. Add 25 mL of 10% MgSO4 . 7H2O solution to the filtrate. Then add approximately 75 mL of 2M NH3 slowly while stirring. A white precipitate of MgNH4PO4 . 6H2O will form. Allow the mixture to sit at room temperature for 15 minutes to complete the precipitation.

My prediction is that as the temperature of water and Ammonia liquid mixture increases, then the solubility of the Ammonia liquid will also increase. BACKGROUND: Although ammonia is well known for its weak base properties, it can also act as an extremely weak acid. Ammonia is a protic substance that can form amides (which contain ions such as the NH2− ion ). Ammonia is a protic substance that is capable of formation of