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## Q3 – Week 10 – 4/11- 4/14

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4/11 – Monday –   B Day

Reminders:

1. Contact – email: grodskib@whbschools.org

Concepts:

1. To determine the percent by mass of ionic solids.

formula mass ditto and composition 0607.pdf

formula mass ditto and composition 0607 key old p.pdf

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4/12 – Tuesday – A Day

Reminders:

1. Contact – email: grodskib@whbschools.org

1. To complete reviewing the skills of calculating the formula mass and percent composition.

2. Hydrate problems

Hydate intro 1213 regents .pdf

Hydate intro 1213 regents key complete.pdf

4/5 – Homework/Classwork:

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4/13 – Wednesday – B Day

Main Goal

1. To Review nomenclature of Binary compounds.

2.  To review the Stock system.

3.  To begin the nomenclature of ternary compounds.

Hydate intro 1213 regents .pdf

Hydate intro 1213 regents key complete.pdf

Lets look at an ionic crystal that has no water called annhydrate.

Lets look at copper (II) sulphate : CuSO4  :

 This image was build by X-ray imaging of salt. Now it is more complex than the crystal above for NaCl because we have a polyatomic ion in the crystal.The Yellow is the Sulfur attached to 4 oxygens (red).  The brown color (i think its brown) is the copper.Notice regular repeating pattern.The sticks represent the bonds or the attractions between the ions.Its hard but if look inside the crystal there is one Cu per sulfate ion.
Lets look at the hydrate of the same salt : copper (II) sulphate pentahydrate  :

 Notice the Dot between anhydrate and water.  This dot means “WITH” and not to multiple.  Thus there are exactly 5 water molecules for every 1 Cu+2 and  1 SO4-2 in the crystal.

 You will notice that water (it has 2 white hydrogen atoms) molecules are situated inside the crystals at particular regions in the crystal in exact ratios.  This is a fixed ratio (stoichiometric ratio).It is hard but you can see the 5 water molecules per 1 copper ion and 1 sulfate ion.What makes it hard is that the crystal repeats in all directions.The water can be removed from the salt by heating it.
CuSO4 • 5H20   ——->    CuSO4  (s)     +      5H20  (g)                                                                                                                               Heat

4/12  – Homework/Classwork:

1.  None

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4/7 – Thursday – B Day

Main Goal

1. To write the chemical names or chemical formulas of Ternary compounds

UIC naming 4 pages – ditto 2.pdf

4/7  – Homework/Classwork:

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4/8 – Friday – A Day

Main Goal

1. To take a RAT Quiz on nomenclature of compounds.

UIC naming 4 pages – ditto 2.pdf