Table of Contents
What was the mystery powder?
The five mystery powders include: baking soda, sugar, cornstarch, salt, and plaster of paris. Students will record their observations on their recording sheet throughout the lesson.
How do you identify a mystery substance?
Identifying Unknown Substances
- Appearance – use a magnifying glass to describe the appearance of the powder.
- Texture – feel the substance by pinching some between your fingers.
- Smell – carefully – without inhaling any – smell the substance.
What is the unknown substance?
An Unknown Substance Analysis is a drug-based scan of many classes of drugs, including prescription medications, illegal drugs and over-the-counter medications. It can be used to identify a pill, powder or substance suspected to be a drug or identify drugs already present in the body.
How do you identify an unknown chemical solution?
Look for color changes, evolution of gas, any evidence of reaction such as precipitates, and enhanced solubility. Record your observations. Repeat the solubility test for the other unknown. Most organic compounds are not water soluble.
Is baking soda a fine powder?
Baking soda is pure sodium bicarbonate, a fine white powder that has many uses. As soon as pure baking soda is blended with moisture and an acidic ingredient, such as honey, buttermilk, molasses, chocolate, yogurt, sour cream, brown sugar, or cocoa, a chemical reaction occurs that produces bubbles of carbon dioxide.
Does cornstarch react to vinegar?
Properties of cornstarch-no reaction with water or vinegar, turns blue with iodine, hardens in clumps with heat.
What type property does the white powder show?
In Part A, you placed a sample of each white powder in water to see if it would dissolve. This property of matter is called solubility. The powders that dissolved in water are soluble. When a solid dissolves in water the mixture of the dissolved solid and the water is called a solution.
Does white powder dissolve in water?
Water Solubility Eight of the twelve possible powders are soluble in water (dissolve in water). The four that are insoluble are calcium sulfate, calcium carbonate, cornstarch, and potassium bitartrate. Solubility in hydrochloric acid (HCl) Calcium sulfate and cornstarch are not soluble in 10% HCl.
What would you use to identify an unknown substance?
How Do We Approach an Unknown Substance
- Gas Chromatography (GC)
- Gas Chromatography Mass Spectroscopy (GC-MS)
- Ion Chromatography (IC)
- High Performance Liquid Chromatography (HPLC)
- Dispersive Raman Spectroscopy.
- Fourier Transfer Infrared Spectroscopy (FTIR)
What can be used to identify an unknown substance?
You can identify an unknown substance by measuring its density and comparing your result to a list of known densities. Density = mass/volume. Assume that you have to identify an unknown metal. You can determine the mass of the metal on a scale.