Based on the following table, determine what each of the unknown substances are

Question

Based on the following table, determine what each of the unknown substances are from the following list.

Unknown Possibilities

glycine calcium carbonate

aluminum iron (III) oxide

adipic acid dodecyl alcohol

iron silicon

sodium carbonate potassium nitrate

salicylic acid graphite

Based on the following table, determine what each of the unknown substances are from the following list.

Unknown Possibilities

glycine calcium carbonate

aluminum iron (III) oxide

adipic acid dodecyl alcohol

iron silicon

sodium carbonate potassium nitrate

salicylic acid graphite

Sample Appearence H2O Soluble? Hexane Soluble? Ethyl Alcohol Soluble? Melting Point Conductivity in solid Conductivity in aqueous pH Rxn in HCl? Rxn in NaOH? #4 Clear Crystals Insoluble Soluble Soluble <100 No No 6 No Rxn No Rxn #8 Black Powder   Insoluble Insoluble Insoluble >100 No Yes 6 Rxn occurs No Rxn #10 White Crystals Insouble Soluble Soluble Unknown No Yes 3 No Rxn No Rxn #5 White Powder Soluble Insoluble Insoluble >100 No No 7 No Rxn No Rxn #6 Black Powder   Insoluble Insoluble Insoluble <100 Yes Yes 6 No Rxn No Rxn #11 Shiny Gray Solid   Insoluble Insoluble Insoluble Unknown Yes Yes 6 No Rxn No Rxn #2 Shiny Gray Solid Insoluble Insoluble Insoluble Unknown Yes Yes 5 No Rxn No Rxn #9 White Crystals    Soluble Soluble Insoluble Unknown No Yes 4 Rxn Occurs Rxn Occurs #7 Red powder Insoluble Insoluble Soluble >100 No Yes 6 No Rxn No Rxn #12 white powder Soluble Souble Insoluble >100 No Yes 12 Rxn Occurs No Rxn #3 White solid Soluble Insoluble Insoluble Unknown No Yes 7 Rxn Occurs No Rxn #1 White solid Insoluble Insoluble Insoluble Unknown No No 6 No Rxn No Rxn

Explanation / Answer

The possible compounds are

glycine : white solid , melting point greater than 100 , soluble in water, sparingly soluble in alcohol, reacts with HCl ((sample # 3)

calcium carbonate : White powder , slightly soluble in water , insoluble in hexane and alcohol , rxn occurs with HCl

aluminum : Shiny gray ((sample # 2)

iron (III) oxide : red coloured (((sample # 7)

adipic acid : White crystals (((sample # 9), soluble in water

dodecyl alcohol: colourless , soluble in ethanol , melting point less than 100 (((sample # 4)

iron : melting point very high, ((sample # 8)

silicon: high melting point , not soluble ((sample # 10)

sodium carbonate : pH greater than 7 (((sample # 12)

potassium nitrate : white solid, soluble in water soluble , conducting, ((sample # 3)

salicylic acid :colorless crystalline : melting point greater than 100 and is known cant say

graphite : shiny gray solid , insoluble in water (sample # 11)

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