CfiH.^O, ^ = ^ 2 C , H , O H + 2CO, T (2)
39
Theo (2): S6' m o l CjH^OH = s6' mol CÔ = 2 s6 mol glucozo = 2 . — (mol)
Kh6'i luong rugu va th^ tich khi CO2 thu dugc vdi hieu suát phan lii la 80%: la 80%: ^ 39 80 , , r mf,„„„=2. .46. =::I6(gam). * C,H,OH ^gQ j Q Q V6 39 80 V^,, = 2 . — . 2 2 , 4 . — = 7,765 (lit). '^"^ 180 100 " De so 1 . 1 0 1. T R A C N G H I E M K H A C H Q U A N C a u 1. Cau sal la A .
DSu, mo b6i tron may moc la cac hidrocacbon, khOng phai la chat beẹ C a u 2. Dap an diing la B. C a u 2. Dap an diing la B.
Phuong trinh hoa hoc:
CH,COOH + NaOH ^ CHjCOONa + H,0 (1) Theo (1): S6' mol CH^COOH = so mol NaOH Theo (1): S6' mol CH^COOH = so mol NaOH
a 200.10
— = = 0,5 (mol) 60 100.40 60 100.40
^ a = 60.0,5 = 30%.
Cku 3. Dap an dung la B. Phuong trinh hoa hoc: Phuong trinh hoa hoc:
(R - 000)3 ^3^5 + 3NaOH ^ 3RC00Na + C3H, (OH)^
C a u 4. Dap an la A .
Phuong trinh hoa hoc:
CHjCOOH + C^H^OH < > CHjCOOC^H, + H^O (1) S6' mol cac chat: S6' mol cac chat:
ncH,cooH = ^ = ^("^°^>= "c,H,oH = ^ = 2,174 (mol).
Theo (1): Rugu C^H^OH du, tinh khoi lugng este etyl axetat theo axit axel! Sau phan ling tao thanh 1 mol C H 3 C O O C 2 H 5 . Sau phan ling tao thanh 1 mol C H 3 C O O C 2 H 5 .
-> Hieu suát phan ling la: H = — . 1 0 0 % = 62,5% . 1.88 1.88
2 . Tir L U A N
Cac phuong trinh hoa hoc:
2C2H,OH + 2Na -> 2C,H,ONa + T (1)
2H2O + 2Na -> 2NaOH + T (2)
Ggi x va y la s6' mol QH^OH va H2O trong dung dich Ạ
Taco: 46x+18y = 20,2 (I)
Theo(l)va (2):
n„, =0,5x + 0,5y = — = 0,25 (mol) (II) 22,4 22,4
Giai he phuong trinh (I) va (II) dugc: x = 0,4; y = 0,1. 0,4.46 0,4.46 0,8 0,1.18 • V c H, o H - ^ ; : ^ = 23 (ml). V,,^=23 + l,8 = 24,8(ml). 23
D6 ruou cua dung dich A la: .100 = 92,4°.
• • 24,8
n. Ofi K I ^ M T R A 45 P H U T
Deso2.1
1. T R A C N G H I E M K H A C H Q U A N
C a u 1. Dap an dung la C. Phuong trinh hoa hoc: Phuong trinh hoa hoc:
CO2 + NaOH ^ NaHCOj (1) Theo (1): S6'mol NaOH = s6'mol CO, = ^ = 0,5 (mol) Theo (1): S6'mol NaOH = s6'mol CO, = ^ = 0,5 (mol)
' 22,4
^ C„ (NaOH) = - = ^ = 1, OM. ' ^' V 0,5 V 0,5
C a u 2. Dap an dung la C.
Nho vai gigt dung dich quy tim vao titog chat: - Chat lam quy tim chuyén thanh'xanh la Bă0H)2. - Chat lam quy tim chuyén thanh'xanh la Bă0H)2.