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Potassium iodide and lead 2 nitrate


on 9 November 2012

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Transcript of Potassium iodide and lead 2 nitrate

-What is Lead 2 Nitrate?
-What is Lead 2 Nitrate used for?
-Safety Precautions
-Physical properties
-Chemical Properties What We Will Explain About Lead II Nitrate What is Lead II nitrate? -Lead II nitrate is an inorganic compound with the chemical formula Pb(NO3)2.

-It commonly occurs as a colourless crystal or white powder. -Lead II nitrate does not occur naturally. The compound can be obtained by dissolving metallic lead in aqueous nitric acid -What is potassium iodide
-Uses for potassium iodide
-Safety when using potassium iodide
-Physical properties
-Chemical properties Potassium Iodide

Potassium iodide is
-A crystalline salt in organic synthesis
- An inorganic compound with the chemical formula KI

-Potassium iodide is used for emergency purposes related to blockade of radioiodine uptake
- Used to "iodize" table salt(a public health measure to prevent iodine deficiency in populations which get little seafood)
-Thyroid protection during medical treatment

-Potassium iodide is a mild irritant and should be handled with gloves.
- Chronic overexposure can have adverse effects on the thyroid
-May be harmful if swallowed
-May be irritating to the mucous membrane if inhaled
-Tests on laboratory animals indicate material may produce adverse mutagenic and reproductive effects
- Boiling point/range (°C): 142°C (760°C mmHg).
- Freezing/melting point (°C): 723°C.
- Solubility: 60% in water.
-Reacts with lead II nitrate to produce lead II iodide What is Lead 2 Nitrate used for? -The "II" in lead II means that the lead has an oxidation state of two. -Historically, the main use was as a raw material in the production of pigments for lead paints - Since around the year 2000, lead(II) nitrate has begun to be used in gold cyanidation. -Because of it's decrepitation, it is used in special explosives such as lead azide -Used to be used in matches and fireworks. -Now used in rocket fuel Safety Precautions -Lead(II) nitrate is toxic, an oxidising agent, and is categorised as probably carcinogenic to humans -You should prevent inhalation, ingestion and skin contact Physical Properties of Lead II Nitrate Chemical Properties -When exposed to potassium iodide, it turns into Lead(II) iodide Lead II Iodide Lead II iodide is a bright yellow solid at room temperature, that reversibly becomes brick red by heating. In its crystalline form it is used as a detector material for high energy photons including x-rays and gamma rays. It is sparingly soluble in cold water but quite soluble in hot water, yielding a colorless solution; on cooling it crystallizes as yellow hexagonal platelets. -melting point: 402 °C
-boiling point: 954 °C
-density: 6.16 g/mL at 25 °C -Eye: May cause eye irritation. Causes eye irritation and possible injury.
-Skin: May cause skin irritation. Causes skin irritation.
-Ingestion: Harmful if swallowed.
-Inhalation: Harmful if inhaled. Conclusion Introduction Today we will be talking to you about
-physical and chemical properties of lead 2 nitrate, potassium iodide,and lead 2 iodide
-safety precautions when using these chemicals
-what these chemicals are used for
-what happens when lead 2 nitrate and potassium iodide combine Conclusion -Safety concerns of lead II nitrate, potassium iodide, and lead II iodide
-Chemical and physical properties of these chemicals
-Wha tthese chemicals are used for By: Shaun and Deaglan + Lead II Nitrate and Potassium Iodide React to Produce Lead II Iodide ----> What is Potassium Iodide? What is Potassium Iodide Used For? Safety Procautions For Using Potassium Iodide Physical Properties of Potassium Iodide Chemical Properties of Potassium Iodide Lead II Iodide Pb(NO3)2 means...

Pb is lead (1 lead atom), NO3 is nitrate (3 oxygen atoms, 1 nitrogen atom). The 2 outside the brackets of the nitrate means 2 nitrates for each lead molecule Lead II Iodide Formula Chemical Formula:Pb(NO3)2(aq) + 2KI(aq) → 2KNO3

Word Equasion: Pb(NO3)2(aq) + 2KI(aq) 2KNO3(ap) is Lead II Nitrate + Potassium Iodide= Lead II Iodide

More detail: 2K= 2 Potassium atoms, NO3=1 Nitrogen atom, and 3 Oxygen atoms Qualitative: -Lustre: Not shiny or reflective
-Colour: Colourless/white
-Odor: None Quantitative : -4.53 g/cm3 (density)
-Melting Point/freezing point :470 deg C
-Solubility: 37.65 g/100 mL (0 °C)
-52 g/100 mL (20 °C)
-127 g/100 mL (100 °C)
-Boiling point: None recorded Qualitative: - Colourless crystals or granules.
- Odourless
- Non-shiny and non-reflective Quantitative: -What is lead II nitrate
-Uses for lead II nitrate
-Safety when using lead II nitrate
-Physical properties of lead II nitrate
-Chemical properties of lead II nitrate Quantitative physical properties: Qualitative physical properties: Colour: Yellow Luster: None
Odor: None Name Lead II Nitrate
Pb(NO3)2 Lead II Iodide Potasssium Iodide
KI Uses Chem. Properties Phys. Properties -Rocket fuel
-Fireworks and Matches
-Gold cyanidation
-Other explosives -Prevention of radiation intake
-Used to iodize table salt -Used as a detector material for high energy photons including x-rays and gamma rays. -Melting Point/freezing point :470 deg C
-Solubility: 37.65 g/100 mL (0 °C)
-Colour: Colourless/white
-Density: 4.53 g/cm3 -When exposed to potassium iodide, it turns into Lead(II) iodide -Melting point: 402 °C
-Boiling point: 954 °C
-Density: 6.16 g/mL at 25 °C
-Colour: Yellow -Colourless crystals or granules.
- Boiling point/range (°C): 142°C (760°C mmHg)
- Freezing/melting point (°C): 723°C
- Solubility: 60% in water -Oxidizes
-Reacts with lead II nitrate to produce lead 2 iodide Conclusion: Formula:
Pb(NO3)2 + 2KI --->PbI2
Pbl2 is : 1 lead atom (Pb), and 2 iodide atoms (I)
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