\(n_{CuSO_4.5H_2O}=\frac{50}{250}=0,2\left(mol\right)\)
\(\Rightarrow n_{CuSO_4}=1.0,2=0,2\left(mol\right)\)
\(\Rightarrow m_{CuSO_4}=0,2.160=32\left(g\right)\)
\(\Rightarrow m_{H_2O}=50-32=18\left(g\right)\)
bai 1: cho 2,35(g) Zn vao 100ml dung dich HCl 0,5M thu duoc chat khi A. cho luong khi A noi tren di qua ong dung Cuo du, nung nong. -tinh khoi luong Cu tao ra Bai 2: cho 8 gam hon hop 2 kim loai Mg, Zn vao 200ml ddHCl khi phan ung ket thuc thi thu duoc 3,36 (l) khi (dktc) neu them tiep luong ddH2SO4 loang du vao thi thay thoat ra them 1,12(l) khi(dktc) a,xac dinh khoi luong cua moi kim loai trong hon hop tren ? b, tinh Cm cua ddHCl o tren? ( moi ngui oi giup mik voi chieu minh phai lam bai rui.ai bt giup mik cai nha!)
Cau 1: cho 4,8(g) magie tac dung voi HCl thi thu duoc 2,24(l) khi hidro(dktc) a, CMR: Mg du con HCl het. b,tim khoi luong cua Mg du, va MgCl2 tao thanh sau phan ung Cau 2:cho 10,8(l) khi Cl (dktc) tac dung voi m(g)Cu. Sau phan ung thu duoc 63,9(g) chat ran a, Chat nao phan ung het, chat nao con du? b,tinh m va phan tram khoi luong cac chat sau phan ung. Cau 3: Dot chay 16g luu huynh thi thu duoc 8,96(l) khi a, CMR luu huynh du b, tinh the tich oxi tham gia vao phan ung Cau 4: cho 5,4g nhom tac dung het voi HCl hon hop thu duoc sau phan ung hoa tan duoc tiep voi m"(g)Mg va thu duoc 2,24(l) khi H2 o dktc . Tim m va m" Cau 5: Cho 8g NaOH tac dung voi m(g) H2SO4. Sau phan ung luong axit con du tac dung vua du voi 11,22g sat: so do phan ung la: NaOH + H2SO4 ->Na2SO4 + H2O a, tinh m b,tinh the tich khi hidro sinh ra o dktc (MOI NGUOI GIUP EM VOI A < MAI EM PHAI NAP BAI ROI)
a)cho phan ung:
Khi hidro+khi oxi-nuoc
ve so do cua phan ung hoa hoc.
nhin ve trai va ve phai cua so do phan ung tren va cho biet so nguyen tu cua moi nguyen to co bang nhau hay khong ?giai thich.
Ai hoc sach vnen giup minh voi!nhanh len.
gup em voi nek
CAU 1: cho 6(g) Ca vao 73(g) dd HCl 10%, sau phan ung thay thoat ra V lit kkhi o dktc
a, tim V
b, neu dan luong khi noi tren di qua ong dung n(g) Cu co nung nong , ket thuc phan ung co 10(g) chat ran con lai . tim m?
( giup em voi anh chi oi )
mot hon hop gom 2 kim loai Na va Fe .
Neu cho hon hop nay vao nuoc du thi thay thoat ra V lit khi , con neu dem cung khoi hon hop do vao dd HCl du thay thoat ra 1,5 V lit khi .
- xac dinh % ve khoi luong cua 2 kim loai trong moi hon hop
( giup em voi mai em phai nap bai rui . huhu)
cau 1: cho 3,2 g Cu tac dung voi V lit khi O2, sau phan ung thi O2 con du . luong O2 con du nay tac dung vua du voi 11,2 g sat. Tinh V CAu2: dot chay hoan toan 16g canxi . Cho chat ran sau phan ung tac dung voi 18, 25g axit HCl. Tinh khoi luong cac chat con lai sau phan ung : CaO +HCl -> CaCl2 +H2O
( giup mik voi chieu mik lam bai rui _huhu)
cho 6 (g) Cu vao 73(g) dd HCl 10%. Sau phan ung thay thoat ra V lit khi o dktc
a. tim V
b, neu dan luong khi noi tren di qua ong dung m(g) Cu co nung nong ket thuc phan ung co 10(g) chat ran con lai . Tim m?
( moi nguoi oigiup em voi ak)
Bai 1: dot chay 6,4(g) luu huynh bang 11,2 (l) khi O2(dktc) thu duoc san pham la SO2 . Tinh the tich cua cac khi thu duoc sau phan ung hoa hoc tren o dktc Bai 2: dot chay 4,8(g) cacbon bang 6,72 (l) O2 thu duoc san pham sau phan ung la CO2 . Tim khoi luong chat con du va the tich khi CO2 thu duoc Bai 3: cho 20(g) Cu tac dung voi dd chua 18,25(g) HCl . Tinh khoi luong cac chat thu duoc sau phan ung, biet phan ung xay ra theo so do sau: CuO + HCl ->CuCl2 + H2O Bai 4: cho V lit kho O2 o (dktc) tac dung voi 16,8(g)sat. Sau phan ung thu duoc 16(g) sat(III)oxit . a,CMR: O2 phan ung het, sat con du b, Tinh V va khoi luong sat con du
dot chay hoan toan 5,7 g chat huu co X phai dung ua het 8, l khi h2 (đktc) sp chay chi co co2 va h2o theo ti le the tich 44:15 ve kl . tim ct cua x
