Hỏi đáp về Rượu etylic - Hóa học 9

Cho 10ml rượu etylic 90⁰ tác dụng hết với Na . Tính thể tích khí bay ra ( ở đktc ) . Biết khối lượng riêng của rượu etylic nguyên chất là 0,8g /ml , của nước là 1g / ml

HELP ME !!!!

bài 1: Trong cuộc sống , ngoài việc sử dụng cồn làm nhiên liệu , còn có thể dùng nó để sát trùng học rửa các vết thương vì cồn có tác dụng diệt khuẩn .Thực tế người ta dùng cồn 75 độ để sát trùng là tốt nhất mà không dùng cồn 90 độ hoặc 96 độ . Giải thích khả năng diệt khuẩn của cồn 75 độ , tại sao không dùng cồn 90 độ hay 96 độ.

a)làm thế nào để phát hiện lượng nước nhỏ có lẫn trong rượu etylic . nêu phương pháp làm khan rượu etylic có lẫn 1 lượng nhỏ nước ?

b) làm thế nào để có rượu 70 độ từ rượu khan ?

Một hỗn hợp gồm hai rượu liên tiếp nhau trong dãy đồng đẳng của rượu etylic. Lấy 5,3 gam hỗn hợp rượu trên tác dụng với Na, rồi dẫn sản phẩm khí thu được đi qua đồng(II) oxit nung nóng thì thu được 0,9 gam nước . Nếu đốt cháy 1,06 gam hỗn hợp trên, khí thoát ra cho vào bình chứa dung dịch Ca(OH)2 dư thì thu được 5 gam kết tủa.
a. Xác định công thức phân tử , viết công thức cấu tạo của hai rượu
b. tính thành phần phần trăm về khối lượng của mỗi rượu có trong hỗn hợp

dung dịch A là hỗn hợp rượu etylic vad h20 cho 20,2 g A tác dụng hết với với natri thì thu được 5,6 ;ít H2 ( đktc ) . tính đọ của rượu biết d= 0,8 n h20 = 1

Giúp nha

Hòa tan 30 ml rượu etylic nguyên chất vào 90 ml nước cất thì được dd có độ rượu bao nhiêu ?

ai biết thì giúp mình nhé, cảm ơn nhiều !

Mình đang cần gấp nhé!!!!!!

Một lít rượu 92 độ cân nặng bao nhiêu g biết rằng khối lượng riêng là 0,8 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Hoà tan 225ml rượu etylic vào 300ml nước. Tính độ rượu sau khi pha (biết Đr = 0,8g/ml)

Cho 20,2g rượu etylic tác dụng với Na lấy dư thấy thoát ra 5,6 lít khí hidro (đktc)
a) Xác định độ rượu
b) Nếu dùng rượu etylic 40⁰ cho tác dụng với Na thì cần bao nhiêu gam C₂H₅OH để thu được thể tích H₂ nói trên ?
Mọi người giúp em với ạ ^^ chi tiết được thì càng tốt ạ

trình bày quy trình điều chế rượu etylic từ tinh bột( gao, ngo, khoai, san )và nêu tác hại của việc uống nhiều rượu.

tại sao bỗng rượu để bỗng rượu trong không khí thì lại bị chua và khi dùng bỗng rượu để nấu canh thì lại thấy có mùi thơm

Cho 200ml rượu etylic 92^{o tác dụng với Na. Khối lượng riêng của rượu nguyên chất là 0.8 gamml, khối lượng riêng của nước là 1 gamml. Tính thể tích khí H_{2 thu được sau phản ứng}}

Tính thể tích của rượu etylic có trong 750ml rượu 45 độ

Từ tinh bột có thể sản xuất rượu etylic theo sơ đồ: -(C₆H₁₀O₅)-_n-->C₂H₅OH+CO₂ Muốn điều chế 920kg rượu etylic cần khối lượng tinh bột là bao nhiêu ,biết hiệu suất của quá trình là 50%

Từ 200 ml rượu etylic 90^o có thể thêm nước vào để pha chế thành bao nhiêu ml rượu 45^o

( Mấy bạn giải ra giúp mink nhak)

có 80 lít rượu 90 độ, phải đổ bao nhiêu lít nước vào đó để được rượu 40 độ

Mọi người ơi cho hỏi cái này với :
với 2 công thức này thì có khác nhau gì mà họ lại dùng cái thứ (1) mà không dùng cái thứ (2) vậy ạ !

(1) C₂H₅OH + Na → C₂H₅ONa + H2
(2) C2H6O + Na .....

Mọi người ai giúp mình giải bài này với

Tính độ rượi thu được khi trộn 1,5l rượu 40 độ với 1,3l rượu 60 độ

có thể pha chế được bao nhiêu ml rượu 15^o từ 500ml rượu 30^o

cho 10gam hon hop ruou etlic va axit axetic tac dung vua du voi 53 gam dung dich na2co3 10 ^{_{phan tram}}

^{_{a. viet phuong trinh hoa hoc xay ra}}

^{_{b. tinh khoi luong moi chat trong hon hop dau}}

Tính công thức cấu tạo của một loại rượu ROH có khối lượng là 0,32g , biết V của hiđro là 112ml.

Đốt cháy hoàn toàn 30ml rượu etylic dẫn toàn bộ sản phẩm cháy qua dung dịch nước vôi trong dư thu được 100g kết tủa trắng. Xác định độ rượu. Biết D rượu =0.8g/ml, D nuoc= 1g/ml

Rượu A có công thức C_{nH2n+1OH, trong phân tử rượu B hơn rượu A một nhóm -CH2. Cho 11g hỗn hợp 2 rượu trên tác dụng với Na thì thu được 3,36l H2 (đktc).}

ahttps:https://hoc247.net/image/faq/data2/216985_.https://hoc247.net/image/faq/data2/216985_.hoc247.nethttps://hoc247.net/image/faq/data2/216985_.imagehttps://hoc247.net/image/faq/data2/216985_.faqhttps://hoc247.net/image/faq/data2/216985_.data2https://hoc247.net/image/faq/data2/216985_.563596_. Xác định CTPT, CTCT của 2 rượu

bhttps:https://hoc247.net/image/faq/data2/216985_.https://hoc247.net/image/faq/data2/216985_.hoc247.nethttps://hoc247.net/image/faq/data2/216985_.imagehttps://hoc247.net/image/faq/data2/216985_.faqhttps://hoc247.net/image/faq/data2/216985_.data2https://hoc247.net/image/faq/data2/216985_.563596_. Tính khối lượng mỗi chất trong hỗn hợp

giới hạn nồng độ cồn trong máu của người lái xe tối đa cho phép là 80mg etanol/100ml máu .Nồng độ mol của etanol trong máu người tối đa là bao nhiêu ?

nhận biết rượu etylic,axit axetic ,atyaxetat