13 questions Salt and sugar lab

What does the "H" in pH test stand for?

Hydrogen

How would doing the combustibility test (burning chemical) help you determine if your chemical is ionic or covalently bonded?

If a substance is combustible or flammable, there is a good chance that it is a covalent bond.

What type of intramolecular bonding does sugar have? Draw the Lewis Dot Structure for sugar (sucrose). (Think biology!)

Intra bonding is ionic,covalent,metallic. Inter bonding involves phase changes. Sugar has covalent intramolecular bond. Covalent bonds are the weakest.

What type of intramolecular bonding does salt have? Draw a crystalline structure to show

Ionic bond are the middle metallic is the strongest bond

Draw a particle diagram of sugar dissolving in water and salt dissolving in water.

Ionically bond dissolve in water into charged particles. Covalent stays in the own molecules.

How would doing the flame test help you determine if your chemical is ionic or covalently bonded?

Metals contain a distinct color when in a flame. So if it has a distinct color, it is most likely a metallic or ionic bond.

What have we learned in the past that would allow sugar to have a lower melting point than salt?

Sugar has a lower melting point because intermolecular forces are weaker than salt because of its chemical makeup. Both substances are breaking down into individual molecules, not atoms.

Why do we use deionized water for the pH testing and electrical conductivity testing?

The deionized water does not contain any ions.

How would doing the pH test help you determine if your chemical is ionic or covalently bonded?

The pH test helps determine if your chemical is ionic or covalently bonded, because Ionic and covalent bonds do not react with acids

Why were sugar and salt used in this lab?

The salt and sugar are used in this lab because we compare the XXX to the sugar and salt. Without comparing the XXX to the sugar and salt, we could not find if all these substances were ionic, covalent, or metallic

In the experiment, one chemical conducted electricity, and the other did not. Tell me with one that did, and why it did conduct electricity.

The salt dissolved into charged particles which the charge particles conduct electricity.

When watching a sugar crystal and a salt crystal pass through water, the sugar crystal "dissolves" faster. What is meant by dissolving?

The substances are being broken down into molecules from their crystal form.

Name at least three things you need to remember when working with the deionized containers at your tables

Wash off watch glasses with the deionized water before putting the water on the watch glass. Do not test conductivity by putting the tester directly in the deionized water, or else it will all become contaminated. If you have contaminated water, ask Mrs. Bair so you can get new deionized water.