m easurements and c alculations in chemistry - hydrates dr. chin chu chemistry river dell high...
TRANSCRIPT
![Page 1: M EASUREMENTS AND C ALCULATIONS IN CHEMISTRY - HYDRATES Dr. Chin Chu Chemistry River Dell High School](https://reader035.vdocuments.site/reader035/viewer/2022062718/56649eba5503460f94bc261b/html5/thumbnails/1.jpg)
MEASUREMENTS AND CALCULATIONS IN CHEMISTRY - HYDRATES
Dr. Chin Chu
Chemistry
River Dell High School
![Page 2: M EASUREMENTS AND C ALCULATIONS IN CHEMISTRY - HYDRATES Dr. Chin Chu Chemistry River Dell High School](https://reader035.vdocuments.site/reader035/viewer/2022062718/56649eba5503460f94bc261b/html5/thumbnails/2.jpg)
DEFINITION:Hydrates in Inorganic Chemistry – are inorganic salts “containing water molecules combined in a definite ratio as an integral part of the salt crystal that are either bound to a metal center or that have crystallized with the metal complex.
![Page 3: M EASUREMENTS AND C ALCULATIONS IN CHEMISTRY - HYDRATES Dr. Chin Chu Chemistry River Dell High School](https://reader035.vdocuments.site/reader035/viewer/2022062718/56649eba5503460f94bc261b/html5/thumbnails/3.jpg)
NAMING OF HYDRATES
![Page 4: M EASUREMENTS AND C ALCULATIONS IN CHEMISTRY - HYDRATES Dr. Chin Chu Chemistry River Dell High School](https://reader035.vdocuments.site/reader035/viewer/2022062718/56649eba5503460f94bc261b/html5/thumbnails/4.jpg)
NAMING OF HYDRATES – EXERCISE
Formula Name
CoBr2·6H2O
ZnSO4·7H2O
Copper(II) nitrate monohydrate
Iron(III) nitrate nonahydrate
![Page 5: M EASUREMENTS AND C ALCULATIONS IN CHEMISTRY - HYDRATES Dr. Chin Chu Chemistry River Dell High School](https://reader035.vdocuments.site/reader035/viewer/2022062718/56649eba5503460f94bc261b/html5/thumbnails/5.jpg)
NAMING OF HYDRATES – EXERCISE ANSWERS
Formula Name
CoBr2·6H2O Cobalt(II) bromide hexahydrate
Cu(NO3)2·H2O
ZnSO4·7H2O
Fe(NO3)3·9H2O
Copper(II) nitrate monohydrate
Zinc sulfate heptahydrate
Iron(III) nitrate nonahydrate
![Page 6: M EASUREMENTS AND C ALCULATIONS IN CHEMISTRY - HYDRATES Dr. Chin Chu Chemistry River Dell High School](https://reader035.vdocuments.site/reader035/viewer/2022062718/56649eba5503460f94bc261b/html5/thumbnails/6.jpg)
HOW TO FIGURE OUT THE HYDRATE FORMULA?
![Page 7: M EASUREMENTS AND C ALCULATIONS IN CHEMISTRY - HYDRATES Dr. Chin Chu Chemistry River Dell High School](https://reader035.vdocuments.site/reader035/viewer/2022062718/56649eba5503460f94bc261b/html5/thumbnails/7.jpg)
THE PROCESS
![Page 8: M EASUREMENTS AND C ALCULATIONS IN CHEMISTRY - HYDRATES Dr. Chin Chu Chemistry River Dell High School](https://reader035.vdocuments.site/reader035/viewer/2022062718/56649eba5503460f94bc261b/html5/thumbnails/8.jpg)
HYDRATES EXAMPLEA calcium chloride hydrate has a mass of 4.72 g. After heating for several minutes the mass of the anhydrate is found to be 3.56 g. Use this information to determine the formula for the hydrate.
![Page 9: M EASUREMENTS AND C ALCULATIONS IN CHEMISTRY - HYDRATES Dr. Chin Chu Chemistry River Dell High School](https://reader035.vdocuments.site/reader035/viewer/2022062718/56649eba5503460f94bc261b/html5/thumbnails/9.jpg)
A hydrate of magnesium sulfate has a mass of 13.52 g. This sample is heated until no water remains. The MgSO4 anhydrate has a mass of 6.60 g. Find the formula and name of the hydrate.
When 8.00 g of Pb(C2H3O2)2· xH2O are heated, 1.14 g of H2O are driven off. Find the chemical formula and the name of the hydrate.
A hydrate is determined to be 45.43% water and 54.57% CoCl2. Find the chemical formula and name for this hydrate. (*Hint – assume that there is 100 g total of hydrate compound.)
HYDRATES – PRACTICE PROBLEMS
![Page 10: M EASUREMENTS AND C ALCULATIONS IN CHEMISTRY - HYDRATES Dr. Chin Chu Chemistry River Dell High School](https://reader035.vdocuments.site/reader035/viewer/2022062718/56649eba5503460f94bc261b/html5/thumbnails/10.jpg)
[MgSO4·7H2O, magnesium heptahydrate]
[Pb(C2H3O2)2· 3H2O, lead(II) acetate trihydrate]
[CoCl2· 6H2O, cobalt(II) chloride hexahydrate]
HYDRATES – PRACTICE PROBLEMS ANSWERS