Bài 9. Công thức hoá học

Thursday, November 09, 2017
1
Thursday, November 09, 2017
2
TIET 9: CONG THUC HOA HOC (cthh)
TIET 9: CONG THUC HOA HOC
Thursday, November 09, 2017
3
I, CONG THUC HOA HOC CUA DON CHAT
DAP AN
Cong thuc hoa hoc cua don chat Dong la gi?
Cong thuc hoa hoc cua don chat Dong la Cu
TIET 9: CONG THUC HOA HOC
Thursday, November 09, 2017
4
1, Vi du
I, CONG THUC HOA HOC CUA DON CHAT
DAP AN
2, NHAN XET
+ CTHH cua don chat gom:
- 1 KHHH cua mot ngto tao nen
- Chu so chi so luong ngtu co trong 1 phan tu chat
CHI SO
( Viet duoi chan, ben phai KHHH)
Thursday, November 09, 2017
5
3, CTHH CHUNG
AX

Thursday, November 09, 2017
6
A: KHHH nguyen to
tao nen don chat
X: chi so
II, CONG THUC HOA HOC CUA HOP CHAT
1. Nhan xet
CTHH cua hop chat gom
+ Tu 2 KHHH tro len
+ Chi so viet duoi chan, ben phai mo KHHH
7
2, CTHH CHUNG
AXBY
Thursday, November 09, 2017
8
A,B : KHHH cua cac ngto

X, Y: chi so
III, Y NGHIA CUA CTHH
+ CTHH dung de bieu dien ngan gon 1 chat
+ Moi CTHH cho ta biet y nghia sau day:
- Ngto nao tao nen chat Biet duoc do la hop chat hay don chat
- Chi 1 phan tu chat
- Cho biet so luong ngtu moi loai ngto trong 1 phan tu
- Tinh duoc 1 phan tu chat
Thursday, November 09, 2017
9
Thursday, November 09, 2017
10