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Why is it important to identify an unknown substance?
Because the substance could potentially be extremely toxic or harmful. You must never use an unknown substance in experiments without identifying it first, many tests can be undertaken to determine the cation and anion. These tests include the flame test, solubility tests, precipitate reaction tests and conductivity tests. These do vary depending on the unknown substance.
How do you determine solubility of a substance?
You need to determine it experimentally. Keep adding measured amounts of solid into a known volume of water (say 1L) until it cannot precipitate anymore. Measure the remaining precipitate and subtract it from the total amount of substance you added. Then use the periodic table to determine the molar mass of your compound in grams/mole. Divide the amount of mass that dissolved by its molar mass to get the amount of moles. Then, since solubility is in mole/Liter, you divide the amount of moles by the volume in the container. Boom, solubility.
How could you use the property of solubility to help identify a type of matter?
Testing by solubility may be a qualitative evaluation of a substance or is used for differenciation of compounds. But it is not a true identification method.
What property can you use to determine an unknown object?
weight
How do you experimentally determine the pressure of the unknown when its a gas?
You can use a manometer.
What can you use your senses to observe?
You can visually observe the color, opacity, viscosity of a substance. You can listen for audible sounds emanating from the substance. You can waft air currents over the substance to see if you can smell anything - NEVER directly sniff an unknown substance. You could touch the substance while wearing chemical resistant gloves to determine texture. The only sense you absolutely should not use is the sense of taste as you could be accidentally ingesting a poision or toxin.
You can use your senses to observe a what?
You can visually observe the color, opacity, viscosity of a substance. You can listen for audible sounds emanating from the substance. You can waft air currents over the substance to see if you can smell anything - NEVER directly sniff an unknown substance. You could touch the substance while wearing chemical resistant gloves to determine texture. The only sense you absolutely should not use is the sense of taste as you could be accidentally ingesting a poision or toxin.
How do you use the word milligram in a sentence?
The instructions called to measure out 90 milligrams of the unknown substance.
How do electron dot diagrams help you predict the solubility of a substance?
I found out that electron dot diagrams can be helpful because, what if you want to have an easier way to represent the atoms and the electrons in the outer energy level then electron dot diagrams are much easier to use.
Why Do You Think Scientists Can Use The Basic Properties Of Matter To Help Identify An Unknown Substance?
Because if a substance can't be known then it has to prove its mass and volume
How many people use twitter in the uk?
An exact figure is unknown. These statistics are difficult to determine.
How can you determine the density of a substance?
Use the formula density = mass divided by volume.
