Question

In: Chemistry

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

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

Rxn in HCl?

Rxn in NaOH?

Clear Crystals

Insoluble

Soluble

<100

No Rxn

Black Powder Insoluble

Insoluble

>100

Yes

Rxn occurs

No Rxn

#10

White Crystals Insouble

Soluble

Unknown

Yes

No Rxn

White Powder Soluble

Insoluble

>100

No Rxn

Black Powder Insoluble

Insoluble

<100

Yes

No Rxn

#11

Shiny Gray Solid Insoluble

Insoluble

Unknown

Yes

No Rxn

Shiny Gray Solid Insoluble

Insoluble

Unknown

Yes

No Rxn

White Crystals

Soluble

Insoluble

Unknown

Yes

Rxn Occurs

Red powder

Insoluble

Soluble

>100

Yes

No Rxn

#12

white powder Soluble

Souble

Insoluble

>100

Yes

Rxn Occurs

No Rxn

White solid

Soluble

Insoluble

Unknown

Yes

Rxn Occurs

No Rxn

White solid

Insoluble

Unknown

No Rxn

Solutions

Expert Solution

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)

queen_honey_blossom answered 1 year ago

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