Hauv tsev kawm ntawv theem siab, lawv pib chemistry tsis ntxov dua qib 8, qhov kev tshawb fawb no nyuaj heev rau cov menyuam yaus pom. Tab sis koj tuaj yeem npaj cov tub ntxhais kawm rau qhov kev kawm hauv txoj kev yooj yim heev thiab tho txawv - los ntawm kev teeb tsa kev sim hauv chemistry hauv tsev. Cov kev sim me me no yuav pab saib kev tshawb fawb los ntawm lwm lub kaum sab xis, thiab qhia "kev ua txuj ci dag" ntawm cov menyuam yaus tog yuav ua rau muaj kev lom zem ntau ntxiv.
daim nqi hluav taws xob
Rau qhov ua tau zoo kawg, tab sis kev ua kom yuam kev yooj yim, koj yuav xav tau:
- banknote;
- dej-cawv daws nrog txog 50% cawv;
- ntsev;
- tweezers lossis tweezers.
Ib pinch ntsev yuav tsum tau ntxiv rau cov tshuaj. Tom ntej no, ib daim nqi yog muab tso rau hauv kev daws nrog kev pab los ntawm tweezers. Rau cov uas tab tom ua qhov kev sim no hauv chemistry thawj zaug, nws yog qhov zoo dua los ua tus nqi qis dua!
Tom qab cov nyiaj ntub dej tas lawm, nws yuav tsum tau muab rov qab nrog tweezers thiab me ntsis co tawm cov kua ntau dhau ntawm daim ntawv. Tam sim no koj tuaj yeem muab nws tua hluav taws! Cov hluav taws yuav dhau los ntawm tag nrho cov ntawv nyiaj, tab sis tsis yog ib qho ntug yuav tig liab. Qhov no yog vim qhov tseeb hais tias cov cawv muaj nyob rau hauv cov tshuaj hlawv. Nyob rau hauv lem, cov dej uas soaked daim ntawv tsis muaj sij hawm mus evaporate.
Crystal qe
Loj hlob muaju yog ib qho ntawm cov nyiam nyiam uas lom zem chemistry muaj. Kev sim nrog crystallization feem ntau yog ua los ntawm cov piam thaj, tab sis cov piam thaj muaju tsis xav tsis thoob rau leej twg. Peb muab qhov tshiab thiab txawv txawv - cov muaju loj hlob ntawm cov qe!
Crystal qe tuaj yeem tau nrog:
- alum (muag ntawm lub tsev muag tshuaj);
- PVA kua nplaum;
- dyes.
Crystals ntawm qe yuav loj hlob sai heev, hauv ib hnub nkaus xwb. Koj yuav tsum xub ntxuav lub plhaub thiab qhuav kom huv si. Tom qab ntawd, lub qe yog smeared nrog kua nplaum thiab sprinkled nrog alum. Tam sim no lawv yuav tsum tau pw ob peb teev kom qhuav dua.
Tom ntej no, cov xim yuav tsum tau yaj hauv ob khob dej dawb. Tus nqi ntawm cov dye tuaj yeem xaiv ntawm nws tus kheej, qhov no tsuas yog cov xim siv lead ua nyob ntawm nws. Qe muab tso rau hauv cov xim rau ib hnub lossis ib hnub. Qhov ntev ntawm lub qe nyob rau hauv cov tshuaj, qhov loj ntawm cov muaju loj hlob tuaj. Nws yog ib qho tsim nyog noj tawm cov qe ua kua nplaum ua tib zoo ua tib zoo - lawv tsis yooj yim heev.
Npaj rau ntawm lub raj mis
Koj tuaj yeem ua kom lub zais pa yam tsis muaj helium yam tsis siv lub cev? Ua li no, koj tuaj yeem siv cov dej qab zib zoo tib yam thiab vinegar, uas yog nyob rau hauv lub txee dai khaub ncaws hauv chav ua noj ntawm txhua leej niam. Txhawm rau ua qhov kev sim chemistry no, koj yuav xav tau:
- balloon;
- bottle;
- 3-4 teaspoons baking soda;
- rooj vinegar.
Siabpw tsaug zog ncaj qha mus rau hauv lub pob nrog ib tug funnel los yog diav. Tom qab ntawd, nws yog muab tso rau hauv ib lub raj mis nrog ib tug me me ntawm vinegar. Thaum cov dej qab zib los ntawm lub zais pa pib sawv hauv lub raj mis, nws pib o, zoo li los ntawm helium. Qhov no yog vim lub fact tias vinegar reacts nrog baking soda, tso carbon dioxide. Lub balloon inflates ua tsaug rau cov roj hauv ob peb feeb, tsuas yog ntes nws!
Cov khaubncaws sab nraud povtseg hauv lub raj mis
Kev sim tshuaj lom neeg hauv qab no yuav piav qhia meej rau tus menyuam lub tswv yim ntawm cov kua dej ntom ntom. Siv tau rau qhov no:
- ib khob roj sunflower;
- ib khob dej tinted tej xim ci;
khob qab zib syrup (rau qhov ua kom pom tseeb, koj yuav tsum ntxiv zas rau nws).
Tus menyuam tuaj yeem twv ua ntej yuav muaj dab tsi tshwm sim thaum sib tov tag nrho cov kua dej no. Nws yuav nyiam qhov tshwm sim - lub syrup yuav nyob twj ywm raws li qhov ntom ntom, dej yuav nyob hauv nruab nrab, thiab cov roj yuav nyob rau saum. Koj tuaj yeem sim nrog cov xim thiab cov kua dej, ua cov khoom sib xyaw uas tsis xav tau. Piv txwv li, los ntawm kev ntxiv cov suab thaj sib txawv rau syrup, koj tuaj yeem tau txais ntau cov kua sib txawv.
Kev sim hauv chemistry tuaj yeem dhuav heev. Cov tswv yim yooj yim tab sis yooj yim no yuav pab txhawb koj tus menyuam kawm txuj ci thiab tsuas yog muaj kev lom zem rau hnub los nag.
