Maxay tahay sababta heerka falcelinta ee Si iyo NaOH uu uga dhakhso badan yahay SiO2?

Sababta heerka falcelintasilikooniyo sodium hydroxide waxay dhaafi kartaa kan silicon dioxide waxaa lagu falanqeyn karaa dhinacyada soo socda:

Farqiga u dhexeeya tamarta isku xidhka kiimikada

▪ Falgalka silicon iyo sodium hydroxide: Marka silicon uu la falgalo sodium hydroxide, tamarta isku xidhka Si-Si ee u dhaxaysa atamka silicon waa 176kJ/mol oo keliya. Xidhiidhka Si-Si wuu jabaa inta lagu jiro falgalka, kaas oo si fudud loo jabin karo. Marka laga eego dhinaca kinetic-ga, falgalku wuu fudud yahay in la sii wado.

▪ Falgalka silicon dioxide iyo sodium hydroxide: Tamarta isku xidhka Si-O ee u dhexeeya atamka silicon iyo atamka oksijiinta ee ku jira silicon dioxide waa 460kJ/mol, taas oo ah mid aad u sarreysa. Waxay qaadataa tamar sare si loo jebiyo isku xidhka Si-O inta lagu jiro falgalka, sidaa darteed falgalku waa mid aad u adag in la sameeyo heerka falgalkuna waa mid gaabis ah.

Hababka kala duwan ee falcelinta

▪ Silikoonku wuxuu la falgalaa sodium hydroxide: Silikoonku wuxuu marka hore la falgalaa sodium hydroxide isagoo la falgalaa biyaha si uu u soo saaro hydrogen iyo silisic acid, ka dibna silikoon acid wuxuu la falgalaa sodium hydroxide si uu u soo saaro sodium silicate iyo biyo. Inta lagu jiro falgalkan, falgalka u dhexeeya silicon iyo biyuhu wuxuu sii daayaa kulaylka, kaas oo kor u qaadi kara dhaqdhaqaaqa molecular, taasoo abuuraysa jawi firfircoon oo loogu talagalay falgalka iyo dardargelinta heerka falgalka.

▪ Silicon dioxide wuxuu la falgalaa sodium hydroxide: Silicon dioxide wuxuu marka hore la falgalaa sodium hydroxide isagoo la falgalaa biyaha si uu u soo saaro silicic acid, ka dibna silicic acid wuxuu la falgalaa sodium hydroxide si uu u soo saaro sodium silicate. Falcelinta u dhaxaysa silicon dioxide iyo biyaha aad bay u gaabis tahay, habka falgalkana asal ahaan ma sii daayo kulaylka. Marka laga eego dhinaca kinetic-ga, ma aha mid ku habboon falcelin degdeg ah.

Qaab-dhismeedyo kala duwan oo agab ah

▪ Qaab-dhismeedka silikoon:Silikoonwuxuu leeyahay qaab-dhismeed gaar ah oo kiristaal ah, waxaana jira farqiyo gaar ah iyo isdhexgal daciif ah oo u dhexeeya atamka, taasoo sahlaysa in xalka sodium hydroxide uu la xiriiro oo uu la falgalo atamka silikoon.

▪ Qaab-dhismeedkasilikoonlaba oksaydh:silikoonoksaydhku wuxuu leeyahay qaab-dhismeed shabakadeed oo deggan.SilikoonAtamyada iyo atamka oksijiinta waxaa si adag ugu xiran isku xidhka covalent si ay u sameeyaan qaab-dhismeed kiristaal adag oo deggan. Way adag tahay in xalka sodium hydroxide uu galo gudaha oo uu si buuxda ula xiriiro atamka silicon, taasoo keenta dhibaato ku timaadda falcelin degdeg ah. Atamyada silicon oo keliya oo ku yaal dusha sare ee walxaha silicon dioxide ayaa la falgeli kara sodium hydroxide, taasoo xaddidaysa heerka falcelinta.

Saamaynta xaaladaha

▪ Falcelinta silikoonka oo leh sodium hydroxide: Marka heerkulku kululaado, heerka falgalka silikoonka oo leh sodium hydroxide ayaa si weyn loo dedejin doonaa, falgalkuna guud ahaan si habsami leh ayuu u socon karaa heerkul sare.

▪ Falgalka silicon dioxide ee sodium hydroxide: Falgalka silicon dioxide ee sodium hydroxide aad ayuu u gaabis yahay heerkulka qolka. Caadiyan, heerka falgalka ayaa la hagaajin doonaa xaaladaha adag sida heerkulka sare iyo xalka sodium hydroxide ee xooggan.