How to make cement at home (simple experiment) скачать в хорошем качестве

How to make cement at home (simple experiment)

This experiment is not included in the MEL Chemistry subscription–we just love to show you the beauty of chemistry💙 For cool and safe experiments to do at home sign up to MEL Science here: https://goo.gl/ZK6dpv It’s easy to make the sim­plest type of ce­ment your­self. In this ex­per­i­ment, we’ll pre­pare a mix­ture which you can use to make a lit­tle house, for ex­am­ple for a dog. Safe­ty pre­cau­tions Wear a pro­tec­tive mask, gloves and glass­es, and work in a well-ven­ti­lat­ed room. Warn­ing! Only un­der adults su­per­vi­sion. Reagents and equip­ment: build­ing lime (cal­ci­um ox­ide, 100 g); sand (300 g); wa­ter (100-150 ml); deep con­tain­er for mix­ing; trow­el; bricks. Step-by-step in­struc­tions Mix the build­ing lime with wa­ter. Grad­u­al­ly add sand and stir thor­ough­ly. We get a sim­ple ce­ment mix­ture. Ap­ply it to bricks and leave for a week. The bricks are stuck to­geth­er! Pro­cess­es de­scrip­tion In the re­ac­tion of cal­ci­um ox­ide with wa­ter, cal­ci­um hy­drox­ide forms. СаО + Н₂О = Са(ОН)₂ In air, cal­ci­um hy­drox­ide re­acts with car­bon diox­ide with the for­ma­tion of durable cal­ci­um car­bon­ate, which en­velops and sticks the sand par­ti­cles to­geth­er Са(ОН)₂ + СО₂ = СаСО₃ + Н₂О