Txij li sijhawm puag thaum ub, cov kua muag pom tsis tau tau siv los khaws zais cia tsis pub lwm tus paub. Yuav ua li cas muaj ntau yam zais tau zais ua tsaug rau kev zais cia, uas tau thov nrog cov tshuaj tshwj xeeb. Cov lus tseem ceeb, ua rau sab saum toj ntawm cov lus ploj thiab pom rau lwm tus, khaws nws cov lus zais kom txog thaum muaj tus "txawj" los nyeem cov ntawv zais ntawm cov kab.
Tsim nyog
- - Cov dej cawv tov ntawm iodine;
- - phenolphthalein;
- - mis;
- - txiv qaub acid;
- - dextrin;
- - ua haujlwm cobalt;
- - lub khob noom cookie;
- - alkali.
Cov Lus Qhia
Kauj ruam 1
Kev xau lossis tsis pom kev tuaj yeem tsim tau, ob qho tib si hauv chav sim tshuaj thiab hauv tsev. Ntxiv mus, qhov xwm nws tus kheej zoo li tshwj xeeb kom tib neeg, ua tsaug rau nws cov khoom plig, tuaj yeem siv lawv hauv kev sau ntawv zais cia. Ntxiv mus, xws li inks tuaj yeem yog ntau hom. Qee qhov tuaj yeem sau cia, thiab lawv yuav tshwm sim tsuas yog thaum cov xwm txheej tshwj xeeb raug tsim: cua sov, ua nrog rau lwm yam tshuaj, thiab lwm yam. Lwm yam inks, uas tau pom meej meej thaum sau ntawv, ploj mus tom qab lub sijhawm tsis ntev. Hauv qhov no, daim ntawv poob nws qhov kev siv tau, tig mus rau hauv cov ntawv dawb paug ntawm daim ntawv.
Kauj ruam 2
Phenolphthalein. Coj tus taw qhia phenolphthalein (kev daws teeb meem tsis muaj xim), kos nws mus rau hauv cov phwj tshuaj thiab txhaj nws rau hauv tus cwj mem quill. Koj tau txais ib lub cwj mem impromptu. Sau cov ntawv xaiv nrog phenolphthalein thiab pat qhuav. Txhawm rau txhim kho thiab nyeem cov ntaub ntawv sau cia, noj qhov ntaws ntub nrog ib qho alkali (potassium hydroxide lossis sodium hydroxide). Koj kuj tseem tuaj yeem siv calcium hydroxide lossis kua qaub dej (cov tshuaj ntshiab uas nyob siab dua cov kua qaub tswm). Cov ntawv yuav tam sim ntawd tig crimson.
Kauj ruam 3
Mov. Nqa dej nplej, sau ntawv rau nws thiab cia kom qhuav. Txhawm rau txhim kho cov ntaubntawv povthawj siv, los so nws nrog ib qho swab dej noo nrog kev haus cawv ntawm iodine. Cov tsiaj ntawv tig xiav vim yog cov hmoov txhuv nplej hauv mov.
Kauj ruam 4
Mis. Sau cov ntawv sau nrog mis thiab cia daim ntawv qhuav. Koj tuaj yeem pom nws los maj mam muab cua sov dua ib qho nplaim taws, tom qab ntawd cov tsiaj ntawv yuav tig xim av. Nws yooj yim heev los siv dua hlau rau qhov no.
Kauj ruam 5
Txiv qaub acid. Npaj cov tshuaj citric acid (cov tshuaj ua kom zoo dua, cov ntawv yuav ci dua yuav yog), sau ntawv nrog nws thiab nws qhuav. Ua kom sov daim ntawv (koj tuaj yeem siv hlau) los tsim cov ntawv nyeem uas tig xim av.
Kauj Ruam 6
Cobalt tshuaj dawb. Npaj ib qho kev daws teeb meem ntawm cobalt chloride (ntau dua qhov kev xav, zoo dua), sau rau ntawm daim ntawv thiab qhuav. Ua kom sov daim ntawv, ntawm uas cov ntawv sau hauv xiav zoo nkauj yuav tshwm sim tam sim ntawd. Tom qab ntawd cov ntawv sau tuaj yeem "ua" kom ploj dua. Ua li no, nws txaus los tuav nws hla lub pa lossis ua pa ntawm nws, thiab dab tsi sau ntawv yuav rov pom tseeb.
Kauj Ruam 7
Dextrin nrog iodine. Dextrin yog ib qho khoom lag luam tuaj yeem tau txais tom qab kho cua sov ntawm cov hmoov txhuv nplej siab (cua sov). Siv ib nrab ib me nyuam diav ntawm dextrin, ntxiv 25-30 ml ntawm iodine cawv tov thiab lim. Sau cov kab ntawv nrog qhov raug kua nyeem xiav. Tom qab 1-2 hnub, cov ntaub ntawv yuav ploj mus vim tsis muaj dab tsi vim lub cev tsis haum ntawm iodine.
