No ke aha i ʻoi aku ka wikiwiki o ka hopena o Si a me NaOH ma mua o SiO2?

No ke aha i ka wikiwiki o ka hopena osilikaa hiki i ka sodium hydroxide ke ʻoi aku ma mua o ka silicon dioxide hiki ke kālailai ʻia mai nā ʻano aʻe:

ʻOkoʻa i ka ikehu hoʻopaʻa kemika

▪ Ka hopena o ka silicon a me ka sodium hydroxide: Ke hana ka silicon me ka sodium hydroxide, ʻo ka ikehu pilina Si-Si ma waena o nā ʻātoma silicon he 176kJ/mol wale nō. Ua haki ka pilina Si-Si i ka wā o ka hopena, kahi mea maʻalahi ke uhaki. Mai kahi manaʻo kinetic, ʻoi aku ka maʻalahi o ka hoʻomau ʻana o ka hopena.

▪ Ka hopena o ka silicon dioxide a me ka sodium hydroxide: ʻO ka ikehu pilina Si-O ma waena o nā ʻātoma silicon a me nā ʻātoma oxygen i loko o ka silicon dioxide he 460kJ/mol, he kiʻekiʻe loa ia. Pono ka ikehu kiʻekiʻe e uhaki i ka pilina Si-O i ka wā o ka hopena, no laila he paʻakikī ke hana ʻana o ka hopena a lohi ka wikiwiki o ka hopena.

Nā ʻano hana like ʻole

▪ Hana ka Silicon me ka sodium hydroxide: Hana mua ka Silicon me ka sodium hydroxide ma ka hana ʻana me ka wai e hana i ka hydrogen a me ka silicic acid, a laila hana ka silicic acid me ka sodium hydroxide e hana i ka sodium silicate a me ka wai. I loko o kēia hana, hoʻokuʻu ka hana ma waena o ka silicon a me ka wai i ka wela, hiki ke hoʻoulu i ka neʻe ʻana o ka molekala, a laila e hana ana i kahi ʻano kinetic maikaʻi aʻe no ka hana a me ka hoʻolalelale ʻana i ka wikiwiki o ka hana.

▪ Hana ka silicon dioxide me ka sodium hydroxide: Hana mua ka silicon dioxide me ka sodium hydroxide ma ka hana ʻana me ka wai e hana i ka silicic acid, a laila hana ka silicic acid me ka sodium hydroxide e hana i ka sodium silicate. Lohi loa ka hana ma waena o ka silicon dioxide a me ka wai, a ʻaʻole hoʻokuʻu ke kaʻina hana i ka wela. Mai kahi manaʻo kinetic, ʻaʻole ia e kūpono i kahi hana wikiwiki.

Nā ʻano mea like ʻole

▪ ʻAno silika:Silikahe ʻano kristal kekahi, a aia kekahi mau hakahaka a me nā pilina nāwaliwali ma waena o nā ʻātoma, e maʻalahi ai ka hoʻopili ʻana o ka hopena sodium hydroxide a me ka hana ʻana me nā ʻātoma silicon.

▪ ʻAno osilikaʻokikenesilikaHe ʻōnaehana pūnaewele wahi paʻa ko ka dioxide.SilikaUa hoʻopaʻa paʻa ʻia nā ʻātoma a me nā ʻātoma oxygen e nā pilina covalent e hana i kahi ʻano kristal paʻa a paʻa. He mea paʻakikī no ka hopena sodium hydroxide ke komo i loko o kona ʻaoʻao a hoʻopili piha i nā ʻātoma silicon, e hopena ana i ka paʻakikī o ka pane wikiwiki. ʻO nā ʻātoma silicon wale nō ma ka ʻili o nā ʻāpana silicon dioxide ke hiki ke pane me ka sodium hydroxide, e kaupalena ana i ka wikiwiki o ka pane.

Ka hopena o nā kūlana

▪ Ka hopena o ka silicon me ka sodium hydroxide: Ma lalo o nā kūlana hoʻomehana, e hoʻolalelale nui ʻia ka wikiwiki o ka hopena o ka silicon me ka hopena sodium hydroxide, a hiki i ka hopena ke holo mālie ma nā mahana kiʻekiʻe.

▪ Ka hopena o ka silicon dioxide me ka sodium hydroxide: Lohi loa ka hopena o ka silicon dioxide me ka hopena sodium hydroxide i ka mahana o ka lumi. ʻO ka maʻamau, e hoʻomaikaʻi ʻia ka wikiwiki o ka hopena ma lalo o nā kūlana paʻakikī e like me ke kiʻekiʻe o ka mahana a me ka hopena sodium hydroxide i hoʻopaʻa ʻia.