Homogeneous Mixture Lab Report

9) Trial E: Remove the syringe and empty the beaker. Add a Thermometer to the beaker. Add 200 mL of Room Temperature water to the beaker and heat with a Bunsen Burner until it reaches 100° C. Remove the Bunsen Burner. Repeat Steps 5 & 6.

The organic layer on the top formed, and was also extracted out through vacuum filtration like the step before. The solid that was produced from the reaction was bright yellow in color. It then was set out to dry for a week, and worked on the next experiment time. After setting the solid aside, the original solution that was still in the separatory funnel, 14 mL of 10% NaOH was added. The aqueous layer was then again separated into a separate flask. This same step was repeated twice more. The aqueous solution that formed was then cooled in an ice-bath. Concentrated HCl was then added until a pH reading of 1 was reached making it an acidic solution. This took 13 mL of HCl to reach the adequate pH. Another precipitate formed from this process, and it was extracted through vacuum filtration. The solid precipitate that was formed was a cloudy white color. It also, was set out to dry for a week until the next experiment time.With the remaining solution in the separatory flask, CaCl2 (a drying agent, which helps dry the precipitate that was filtered out so that no extra liquid will be left over 5), was added. This solution was boiled over a steam bath until no bubbles were present, and left to dry

no chemical bonding takes place in mixtures • Most mixtures can be separated by physical means Physical separation 1. A mixture of iron filings & sulfur can be separated by using a magnet to attract the iron (magnetism) 2. Distillation using heat 3. Filtration exclusion 4. Crystallization using attraction 5.

If it were a compound, it would be a chemical combined elements in fixed ratios that could be separated chemically only. In our lab, we were able to separate the different substances using magnets, filters, and water, nothing chemical - we used physical properties. 6. In our lab, when we carried out the process of filtration, the sand remained on the filter paper. The filtrate is not a pure substance.

A heterogeneous mixture is a type of mixture that has two or more phases visibly observe. _____ 2. Pure substance can either be an Element or a Compound _____ 3. Acid is a chemical substance whose aqueous solutions that has the ability to turn blue litmus red, and the ability to react with bases and certain metals. _____ 4.

Filled two bags with three-quarters of water and one with the salt solution by using the pipette and the pipette pump. Closed carefully with the thread and cut the excess of bag or thread, make sure they are completely sealed before placing them in the beakers. The beakers should be labeled with the crayon and with a pen write down in the paper towel the contents of each beaker and bags respectively to avoid confusions, in the following order. 1) Bag 1 will be filled with distilled water and beaker 1 will be filled with two-thirds of 10% NaCl solution. 2) Bag 2 will be filled with 10% NaCl solution and beaker 2 will be filled with two-thirds of distilled water.

Submerge the graduated cylinder in the plastic tub so that it is completely filled with water. Hold the open end of the graduated cylinder and move it vertically upside-down where the open end of the graduated cylinder is still submerged in the plastic tub. Clamp the graduated cylinder the ring stand of the lab table to keep it in place. perforate a hole in the top of the rubber cork for the solution container. Cut a straw the length of about four inches. place the straw inside of the rubber cork hole. Set up your timer for two minutes.

Since we obtain an unknown proportion of a mixture, it’s important to mention that a mixture is a result of a combination of two or more pure substances that do not react chemically. The physical properties of a mixture depend on its composition because the amounts of each substance making up a mixture can vary. By taking advantage of the unique physical properties of individual components within a mixture, it should be possible to separate a mixture into its components. Mixtures have the following fundamental properties:

The Chemical Earth Part A: The mixtures that will be discussed in this report will be a using a concoction of sand, salt and water. This mixture will be separated into solids of different sizes, solids and liquids, different liquids and solids dissolved in different liquids. A second mixture that will be examined is water which would be separated into different gases. This report will summarise the different separating techniques in thorough detail and how it employed in the two different mixtures.

A pure substance is an element or compound with a constant composition, such as salt. Its components stay in a fixed ratio to each other, and they can only be separated by relatively difficult chemical means. A mixture is a physical combination of pure substances. Their compositions vary and it is easy to physically separate them. Mixtures can be either homogeneous or heterogeneous.

The two experiments were, for the first experiment the group did the Magnesium and Hydrochloric acid (Mg and HCl)

precipitate; then pour over the solid in the funnel. Finally, pour two 10-mL portions of

1. Obtain a sample of the mixture. The mixture you will separate contains three components: NaCl, NH4Cl, and SiO2. Their separation will be accomplished by heating the mixture to sub-lime the NH4Cl, extracting the NaCl with water, and drying the remaining SiO2.

Introduction A mixture is a combination of two or more pure substances that are physically combined [not chemically combined]. There are two types of mixtures, which are homogeneous mixtures and heterogeneous mixtures. Homogeneous mixtures are mixtures that have components which are uniformly distributed throughout the mixture. For example, sugar water is a homogeneous mixture.

A mixture is simply the substance resulting from the combination of one or more elements without chemically joining them. Elements in a mixture not only retain their own unique chemical properties but they are also easily separable from the substance. A mixture contains elements in no specific ratio resulting in a substance with no specific melting point. Common examples of mixtures can include sea water, polluted air or a bowl of cornflakes in milk.