Separation And Purification
Gbogbo ọrọ náà
Most substances in nature come mixed with others, yet chemistry needs pure samples to work with. The art of separation is choosing the right technique for the mixture in front of you, whether that means filtering out a solid, boiling off a solvent, or using boiling-point differences to tease two liquids apart.
In this lesson you will learn the methods of filtration, crystallisation, simple distillation and fractional distillation, when to use each, and how to check whether a substance is pure using its melting and boiling points. These techniques and tests run through the whole of practical chemistry.
Ebumnobi
- Describe and explain methods of separation and purification using: (a) a suitable solvent (b) filtration (c) crystallisation (d) simple distillation (e) fractional distillation.
- Suggest suitable separation and purification techniques, given information about the substances involved.
- Identify substances and assess their purity using melting point and boiling point information.
Akọmọ Ojú-ẹkọ
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Ayẹwo Ẹkọ
Ekele diri gi maka imecha ihe karịrị na Separation And Purification. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- Which method separates an insoluble solid from a liquid? A. Crystallisation B. Filtration C. Fractional distillation D. Simple distillation Answer: B
- Which method would you use to obtain pure water from salty water? A. Filtration B. Crystallisation C. Simple distillation D. Decanting Answer: C
- Which method best separates a mixture of ethanol and water? A. Filtration B. Fractional distillation C. Crystallisation D. Evaporation Answer: B
- A pure substance has a melting point that is: A. Sharp and fixed B. Spread over a wide range C. Always above 100 degrees Celsius D. Impossible to measure Answer: A
- The presence of an impurity in a solid usually: A. Raises and sharpens the melting point B. Lowers the melting point and spreads it over a range C. Has no effect on the melting point D. Removes the melting point Answer: B
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Ọ dị na ngwa Green Bridge
Budata ngwa Green Bridge CBT na ekwentị maọbụ kọmputa gị iji nweta akwụkwọ ndụmọdụ zuru oke, ajụjụ mmụta, na ndị ọzọ.
Àwọn Ìwé Tó Dáa Láti Kà
Meecha Ajụjụ Ule Ọmarịcha
Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Separation And Purification? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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