Baking Soda and Vinegar Investigations Revisited 5. The student is able to draw qualitative and quantitative connections between the reaction enthalpy and the energies involved in the breaking and formation of chemical bonds. The student can interpret titration data for monoprotic or polyprotic acids involving titration of a weak or strong acid by a strong base or a weak or strong base by a strong acid to determine the concentration of the titrant and the pKa for a weak acid, or the pKb for a weak base.
Chemical polarity Sodium chloride white solid NaCl ionic noyes natural no reaction Stearic acid white solid C18H Slightly polar covlaent no bad x yes nox 69 Copper sulfate pentahydrate blue solid CuS04 ionic yes yes natural nox x Material: Repeat for all the material Test 2: Test the solubility in water Put a little material 3in a test tube.
Stirred with the glass stick. Observed if the material was dissolving. Use a PH paper to test the PH of the solution. Repeat for all the materials.
Test the conductivity in solution Used the conductor to touch the solution with the material 3. Repeat for 7 and Test the solubility in hexane Put a little material 3 in a test tube. Added 2 ml of hexane. Stirred with a glass stick Observed if the material was dissolving, recorded the results.
Repeat for 7 and 16s. Observed if there was reaction which will show in bubbles. Repeat for all the materials Test 6: Melting points Used the cellular tube to poke the material the tube.
Record the melting point. Result experimental to conductivity when solid solubility in water ph reaction in hexane melting points below t hcl conductivity when solution name of the substance 7 noyes 3, acidic no noyes salicylic acid 3 no no not able to test yes 87 no no naphthalene 16 noyes acidic no not melting noyes sodium chloride 6 yes no no no not melting lot of bubble no magnesium Theoretical name of the substance type of compound solubility in water ph reaction in hexane melting pointsCC hcl conductivity when solution 7 salicylic acid polar covalent yes acidic no no yes 3 naphthalene non-polar covalent no neutral yes 85 no no 16 sodium chloride ionic yes neutral n noyes 6 magnesium metal no neutral n lot of bubble no Discussion For 7 could not conduct electricity when it was solid, but conduct when it was in olution so it was not metal.
It was soluble in water so it could not be non-polar compound, because non-polar compound would not dissolve in polar solvent such as water.
The PH of the water solution of 7 was acidic, which meant it could only be polar covalent, because all the ionic compound in the list would only have a neutral or base solution.
And it could only be either benzoic acid or salicylic acid. According to all the test results, 7 was proved to be salicylic acid.
It was insoluble in water but soluble in hexane, so it could only be a non-polar covalent compound, since polar solvent only dissolve polar solute, non polar solvent only dissolve non-polar solute. The only non polar compound had all these properties in the list are naphthalene and stearic acid.Hi, I am working on studying for the AP chemistry exam and stumbled upon your cheat sheets.
They seem very helpful! However, I cannot find every core concept cheat sheet.
Signs of a Chemical Change You may not be able to see that any new substances have formed dur- have on the substance? (d) 2. Describe how a physical prop-erty such as mass or texture can change without causing a change in the substance.
(d) 3. Explain why burning is a. Redox and Electrochemistry Oxidation-reduction (redox) reactions are another important type of reaction that you will see questions about on the SAT II Chemistry test. The test writers will expect you to be able to identify elements that are oxidized and reduced, know their oxidation numbers, identify half-cells, and balance redox reactions.
Identify Unknown Solutions. Examining what the following tests produce will identify the substance; Thermal Decomposition of Silver Nitrate: Silver nitrate(aq) decomposes(g) when heated: AP Chemistry Physics Organic Chemistry Chemistry Lab Math Catalog NO.
Publication No. Green Chemistry Analysis of a Mixture AP* ChemistryVBig Idea 3, Investigation 7 An Advanced Inquiry Lab Introduction The Green Chemistry Program was initiated by the Environmental Protection Agency in the with the goal of applying chemical principles to prevent pollution.
AP Correlations for Investigating Chemistry through Inquiry. The College Board’s AP* Chemistry Curriculum Framework has undergone significant changes. The new standards will go into effect for the school year.