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Discovering the Unknown Ion

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by

Danh Nguyen

on 4 March 2016

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Transcript of Discovering the Unknown Ion

Uses for MgSO4
Dessicant
Epsom Salt
Bleach (pH)
Fertilizer (for Mg
Medicinal uses:
laxative
electrolyte replenisher
Seizure preventer/reducer
Eclampsia (during/post-birth seizures)
Works Cited
https://pubchem.ncbi.nlm.nih.gov/compound/magnesium_sulfate#section=Top
Discovering the Unknown Ion: #12
Matt Bemis,
Luke Danowski,
Danh Nguyen

Odor: Odorless

Physical State: White Powder, Appearance similar to sugar

Solubility: fully soluble

pH: 6
Synthesis of Previously Identified Ionic Compound
Flame Test
Hydrous States
pH Test

Ammonium - Flame Test: Colorless
Flame Test w/Cobalt: Colorless

Magnesium - Flame Test: Colorless
Flame Test w/Cobalt: Colorless

Sodium - Flame Test: Bright Orange
Flame Test w/Cobalt: Bright Orange

Calcium - Flame Test: Orange
Flame Test w/Cobalt: Orange

Potassium - Flame Test: Colorless
Flame Test w/Cobalt: Colorless

Unknown -Flame Test: Colorless
Flame Test w/ Cobalt: Colorless






Crystals, Powder: Heptahydrate


20 C (Dry air) loses 1 H2O
70-80 C loses 4H2O
100 C loses 5H2O
120 C loses 6 H2O - readily re-absobs water
250 C loses last mol H2O
http://www.garden.org/articles/articles.php?q=show&id=68
https://pubchem.ncbi.nlm.nih.gov/compound/magnesium_sulfate#section=Use-and-Manufacturing
Sulfate Test
Additional Sulfate Info
Chloride Test
Additional Chloride Info
Nitrate Test
Nitrate Additional Info
Carbonate Test
Acetate Info
Additional Acetate Info
Reagent 2 -1mL 6M HCl
Reagent 3 -1mL 0.1M BaCl2

Positive Control Test:
Reagent 1 (TEST SOLUTION) -1mL 1M H2SO4
Result -
White precipitate

Negative Control Test:
Reagent 1 -1mL Deionized H20
Result -None

Unknown Ionic Compound Test:
Reagent 1 -1mL unknown solution
Result -
White Precipitate
Cation Test Results
Positive Control Test:
Reagent 1 -1M HCl
Result -
White precipitate

Negative Control Test:
Reagent 1 -1mL DH20
Result -None

Unknown Ionic Compound Test:
Reagent 1 -1mL unknown solution
Result -None
Reagent 2 -3mL 18M H2SO4
Reagent 3 -2mL Nitrate Test Reagent

Positive Control Test:
Reagent 1 -1mL 1M HNO3
Result -
Brown Ring

Negative Control Test:
Reagent 1 -1mL Deionized H20
Result -None

Unknown Ionic Compound Test:
Reagent 1 -1mL unknown solution
Result -None
Reagent 2 -1mL 6M HCl

Positive Control Test:
Reagent 1 (TEST SOLUTION) -1mL 1M Na2CO3
Result -Bubbles

Negative Control Test:
Reagent 1 -1mL Deionized H20
Result -No bubbles

Unknown Ionic Compound Test:
Reagent 1 -1mL unknown solution
Result -No bubbles
Reagent 2 -1 drop H2SO4
Reagent 3 -1mL CHO

Positive Control Test:
Reagent 1 (TEST SOLUTION) -1mL 1M HC2H3O2
Result -Bananas!

Negative Control Test:
Reagent 1 -1mL Deionized H20
Result -Alcohol Smell

Unknown Ionic Compound Test:
Reagent 1 -1mL unknown solution
Result -Alcohol Smell
I LOVE
Magnesium Sulfate!
Reagent 2 -1mL 6M HNO3
Reagent 3 -1mL 0.1M HgNO3
CHM 277 Lab Lectures by Prof. Buenviaje
Introduction to Molecular Chemistry, Tro
Fun Facts
MgSO4 ∙ 11H2O is thought to be present on Mars!

Main acoustic absorbing substance in seawater

First discovered in the wells of Epsom, England
MgO (s) + H2SO4 (aq) -> MgSO4 (aq) + 2 H2O (l)
Full transcript