Zvimiro zveElectrolyte Solutions
Pendauluan
Hunhu hwekugadzirisa zvinhu hunoenderana chete nehuwandu hwezvinhu zvinonyungudutsa muchinhu chimwe chete, zvisinei nerudzi kana hunhu hwemakemikari hwezvinhu izvozvo. Mhinduro dzeElectrolyte dzine hunhu hwakasiyana nekuti dzine zvinonyungudutsa zvinogona kuita ioni, zvichigadzira maion akanaka neasina kunaka. Maitiro aya akasiyana nemhinduro dzisina electrolyte, uko solute inoramba iri muchimiro chemamorekuru ega ega.
Musiyano unonyanya kuoneka pakati pemhinduro dze electrolyte nedze nonelectrolyte ndehuwandu hwezvimedu zvinogadzirwa kana solute yanyungudika mu solvent. Mumhinduro dze nonelectrolyte, huwandu hwezvimedu mu solution hunoenderana nehuwandu hwema molecules e solute. Kusiyana neizvi, mumhinduro dze electrolyte, solute inopatsanuka kuita ma ions, zvichiwedzera huwandu hwezvimedu mu solution.
Zvivakwa zveKubatanidzwa
Zvinhu zvina zvikuru zvinoumba colligative zvemhinduro ndeizvi: vapor pressure depression, freezing point depression, boiling point elevation, uye osmotic pressure. Mumhinduro dze electrolyte, zvinhu zvina izvi zvinoumba colligative zvinokanganiswa nehuwandu hwema ions anogadzirwa nekupatsanurwa kwe solute.
1. Kuderera kweKumanikidzwa kweUtsi (Mutemo waRaoult)
Kudzikira kwekumanikidzwa kwemhepo kunoitika nekuda kwekuvapo kwezvikamu zvinonyungudika muchinhu chinonyungudika chakachena chinodzivisa kusagadzikana kwemamorekuru anonyungudika. Zvichibva pamutemo waRaoult, kudzikira kwekumanikidzwa kwemhepo yemhinduro ye electrolyte kwakakura kupfuura kwemhinduro isina electrolyte ine huwandu hwakafanana, nekuti huwandu hwezvikamu zviri mumhinduro ye electrolyte hwakakura nekuda kwekupatsanurwa kwechinhu chinonyungudika. Semuenzaniso, mole imwe yeNaCl inopatsanurwa kuita maion maviri (Na+ neCl-), saka huwandu hwemigumisiro yezvikamu mumushonga hwakapetwa kaviri pane mole imwe yezvinhu zvisina electrolyte.
2. Kuora Mwoyo Kwechando
Nzvimbo yekuomesa yemushonga itembiricha iyo mushonga unochinja kubva pakuita mvura kuita solid phase. Kana solute yawedzerwa kune solvent, nzvimbo yekuomesa yemushonga inodzikira. Kuora kwechando uku kunoenderana zvakananga nemolarity yemushonga uye van't Hoff factor (i), inova nhamba yezvimedu zvinogadzirwa kubva kuyuniti imwe chete yemushonga mumhinduro. Mumhinduro dze electrolyte, van't Hoff factor yakakura kupfuura imwe, saka kuora kwechando kwakanyanya kupfuura mune mhinduro dzisina electrolyte.
Nzira yekuziva kuderera kwenzvimbo yechando:
\[
\Delta T_f = i \cdot K_f \cdot m
\]
Di mana:
– \(\Delta T_f\) ndiko kuderera kwenzvimbo yechando
– \(i\) ndicho chinhu chinonzi van't Hoff
– \(K_f\) ndicho chinhu chinosimbisa kuderera kwenzvimbo yekutonhora kwemusana (molal freezing point depression) chechinhu chinonyungudutsa
– \(m\) ndiko kusanganiswa kwechinhu chinonyungudutsa
3. Kuwedzera Kwekufashaira
Kuwedzera solute kune solvent kunoitawo kuti poindi yekufashaira yemushonga iwedzere. Nheyo iyi yakavakirwa pakuti zvimedu zvinonyungudutsa zvinokanganisa kubuda kwemvura mumamorekuru esolvent, zvichida tembiricha yakakwira kuti zviwane kumanikidzwa kwakafanana ne solvent yakachena. Sekunge nekuderera kwepoindi yekutonhora, kukwira kwepoindi yekufashaira kwe electrolyte solutions kwakakoshawo kupfuura kwe nonelectrolyte solutions nekuti zvimedu zvakawanda zvinogadzirwa nekupatsanurwa.
Fomura yekukwirira kwenzvimbo yekufashaira:
\[
\Delta T_b = i \cdot K_b \cdot m
\]
Di mana:
– \(\Delta T_b\) ndiko kuwedzera kwekupisa
– \(i\) ndicho chinhu chinonzi van't Hoff
– \(K_b\) ndiyo nzvimbo inodzikamisa molar boiling point elevation ye solvent
– \(m\) ndiko kusanganiswa kwechinhu chinonyungudutsa
4. Kumanikidzwa kweOsmotic
Kumanikidzwa kweOsmotic ndiko kumanikidzwa kunodiwa kuti kumise osmosis, kufamba kwe solvent kuburikidza ne membrane inonyungudika kubva kune imwe mvura yakawanda kuenda kune imwe yakabatana. Kumanikidzwa kweOsmotic (π) kwakakosha mu biochemistry uye physiology nekuti kunochengetedza kuenzana kwemvura mumasero nemumuviri. Mumhinduro dze electrolyte, kumanikidzwa kwe osmotic kwakakwira kupfuura mune dzisina electrolyte nekuda kwehuwandu hwakawanda hwezvidimbu.
Nzira yekumanikidzwa kwe osmotic yakagadzirwa seizvi:
\[
\pi = i \cdot M \cdot R \cdot T
\]
Di mana:
– \(\pi\) ndiyo kumanikidzwa kwe osmotic
– \(i\) ndicho chinhu chinonzi van't Hoff
– \(M\) ndiko kuwanda kwechinhu chinonyungudutsa
– \(R\) ndiyo gasi risingachinjiki rakakodzera
– \(T\) ndiyo tembiricha yakakwana (Kelvin)
Kushandisa uye Kukosha
Kunzwisisa hunhu hwe colligative hwe electrolyte solutions kunobatsira munzvimbo dzakasiyana dzesainzi netekinoroji. Semuenzaniso, mukurapa, mvura inopinzwa mutsinga inofanira kunge iine osmotic pressure yakafanana neyemvura yemuviri kudzivirira kukuvadza masero emuviri. Muindasitiri, hunhu hwe colligative hunoshandiswa mukuchengetedza chikafu, kurapwa nemvura, uye kunyangwe mukugadzira zvigadzirwa zvekuchenesa.
Munzvimbo yakasikwa, hunhu hwekugadzirisa ma electrolyte hunobatsirawo pakuchinja kwezvisikwa kuti zvienderane nemamiriro e osmotic. Zvisikwa zvakawanda zvemugungwa zvinovimba nekukwanisa kwazvo kugadzirisa kumanikidzwa kwemukati me osmotic kuti zvirarame munzvimbo dzine munyu wakawanda.
Mhedziso
Hunhu hwe colligative hwe electrolyte solutions hunoratidza kukosha kwe particle number mukukanganisa zviitiko zvakasiyana-siyana zvemuviri mumhinduro. Kupatsanurwa kwema electrolytes kunowedzera particle number, izvo zvinozowedzera mhedzisiro ye colligative properties dzakadai sekudzikisa vapor pressure, freezing point depression, boiling point elevation, uye osmotic pressure. Kunzwisisa kwakadzama kwe colligative properties kwakakosha kune akasiyana mashandisirwo anoshanda muindasitiri, mishonga, uye zvisikwa.
Pamwe chete nekufambira mberi kwesainzi netekinoroji, mashandisirwo akawanda ekunzwisisa hunhu hwehukama huri kuramba huchigadzirwa kuti zvibatsire zvikamu zvakasiyana-siyana zvenzanga.
