Chemicals Tests for Anions in Various Salts
APPARATUS
Spatula
Test tubes and racks
Pipettes
Chemicals used
Hydrochloric acid
Nitric acid solution
Barium chloride (harmful)
Silver nitrate solution
Metal salts used for testing
Potassium chloride (KCI)
Iron chloride (FECI3)
Sodium sulphate (NASO4)
Calcium carbonate (CACO3)
Lead carbonate (PBCO3)
Tap water
RISK ASSESMENT
Potassium chloride
Explosive when mixed with combustion materials. Never use fabric
gloves to handle substance.
Harmful if inhaled or swallowed. Solution labelled if stronger then 2m
.it may cause your eyes and skin to irritate.
These substances are dangerous with material like sugar, wood, clothes
and etc. these solution ignite easily burn vigorously when dry. This
should not be made available in the lab with concentrated sulphur.
Iron chloride
Sodium sulphate
Harmful if swallowed. Irritant to eyes skin and respiratory system.
Calcium carbonate
Irritant to eyes. Avoid raising and it also irritant to eyes. Keep it
away from water it could cause water to boil if because of the salt.
Contact with combustion material may cause fire.
Lead carbonate
Harmful if inhaled or swallowed. Danger of cumulative effects.
Tap water
Don’t spill it on chemicals.
Important = If you spill any chemicals on your skin and eyes quickly
wash it for it for 10 min and if you can still feel it keep it like
that until you don’t feel anything. Then get it checked by doctor.
METHOD
· Put potassium chloride salts in a test tube using a spatula.
· Add few drops of nitric acid using a pipette. If the salt fizzes
(gives gas off), record the result in the table below and add acid
drops 1 by 1 until it no longer fizzes.
· Add distilled water to 1cm depth. Mix well.
· Add silver nitrate using a clean pipette. Record the results.
· Put the same salt into another test tube.
3.) Divide your 30g of white substance into the 4 test tubes evenly. You should put 7.5g into each test tube along with the water.
the ones that contains ppt in half, then add 6M NH3 to one set of them
throw away. Once that is done rinse off the knife you used and either put it in the sink to be
For the experiment, the effect of different alkaline solutions on the quality of yellow wet noodles was investigated. Four different formulations were used. For formulation A, sodium carbonate was used; formulation B, soda ash; formulation C, potassium carbonate and formulation D was the control with no alkaline solution added.
In procedure A, one must know what an electrolytes is, which is a substance that produces an electrically conducting solution when dissolved in a polar solvent, in this case water is the solvent. Based on the results of the experiment it is can be concluded that the sodium chloride solution best conduct electricity. This is due part by ions being separated into Na+ and Cl- ions from the original NaCl. In other words NaCl(s) becomes Na+ (aq) + Cl- (aq). In doing so allows electricity to flow in the solution. As for the pure/distilled water not conducting electricity it is because it is very filtered free of minerals. Essentially, distilled water lack ions to efficiently conduct electricity, this also applies to the pure substance of sodium chloride and sucrose which lack ions, atoms that have a net negative or positive charge. However, according the results the sucrose is slightly conductive, which may suggest a possible contamination in the solution. At the end it can be reasoned that because ions were made in the NaCl solution, ions contribute to the conductivity.
The goal of the project was to characterize an "unknown" organic acid in order to make a proper identification of the acid, while learning proper techniques for scientific measurement and analysis of error.
One option is to soak a towel in hot water, not boiling water. This method only works if the hickey has been set for at least 2 days. Keep this in mind, cold method for fresh hickeys and heat method for hickeys that are at least a few days old.
Heat and cold - either an ice pack or warm towel may alleviate pain and swelling in the affected area.
Grape soda and Epsom salt, who knew these two items, would lead up to one of the funniest, most embarrassing moments of my life. My basketball team pulled out and very important win, a win that would send us into the state tournament. On the way home, I asked my mom to stop by the store to get me some Epsom salt for my recovery soak. I walked into the store, grabbed the Epsom salt along with a grape soda. For some reason, the store was a little busy, and I stood in line for a short time.
Hand wash with mild detergent in cold water. Hang to dry. Materials can be machine washed, but it is not recommended as doing so will shorten the lifespan of the
This lab was intended to determine the type of bonding in the known and unknown substances using both, physical and chemical properties of substances containing ionic, molecular and metallic bonds. The unknown substances were then observed to see any relationships between the data of the known compounds.
The purpose for this procedure is for students to familiarize themselves with how different types of properties can lead up to identifying substances. For the safety of this experiment be sure to always have your goggles on and tightly secured, due to any splattering of chemicals or glass breakage. Under no circumstance should any chemical be near your mouth. In this procedure students will use four methods that will help identify what is their unknown substance. Once all methods are done its data will provide physical properties of numerical values which students will compare to the list that will lead to identifying their pure substance. The four methods in this experiment are finding the density (g/mL), the solubility, the melting point
The actual, theoretical, and percent yield of sodium chloride was found. Sodium Carbonate was mixed with hydrochloric acid and the liquid was boiled until there was nothing left. The result was the production of salt, or sodium chloride.
The procedure for this experiment can be found in Inorganic Chemistry Lab Manual prepared by Dr. Virgil Payne.
borate) and 1.0 g. of sodium hydroxide in 20 mL of warm water. It may