Kev nqus tshwj xeeb, tseem raug xa mus rau qhov sib txheeb txheeb ze, yog siv los txheeb qhov hnyav lossis ntom ntawm cov kua rau cov dej. Lub ntiajteb txawj nqus tshwj xeeb yog ntsuas tsis muaj ib lub tsev uas tau muab los ua qhov sib piv ntawm qhov hnyav ntawm lwm cov kua lossis qhov ntom ntawm lwm cov kua faib los ntawm qhov hnyav lossis ntom ntawm dej. Qhov kub yuav tsum raug coj mus rau hauv tus account thaum txiav txim siab tshwj xeeb lub ntiajteb txawj nqus, txij li kev hloov pauv hauv kev sib piv rau qhov kub thiab txias.
Cov kauj ruam
Txoj Kev 1 ntawm 3: Ntsuas Qhov Ncauj Tshwj Xeeb nrog Hydrometer
Kauj Ruam 1. Ncuav ib qho piv txwv ntawm koj cov kua rau hauv lub khob
Nco ntsoov tias cov kua hauv lub ntim tob txaus kom cia lub ntsuas dej ntws mus. Yog tias lub ntsuas dej nyob hauv qab ntawm lub khob, koj yuav tsis tau txais kev nyeem ntawv raug. Tawm hauv chav hauv lub thawv rau lub ntsuas dej kom tshem tawm qee cov kua, txwv tsis pub, koj yuav xaus nrog qhov nchuav.
Cov duab thiab cov khoom ntawm lub ntim tsis muaj feem cuam tshuam yog tias muaj cov kua txaus txaus rau lub ntsuas dej kom ntab kom raug
Kauj Ruam 2. Txheeb xyuas tias koj cov kua yog qhov ntsuas kub raug
Koj lub ntsuas dej yuav raug ntsuas rau qhov kub tshwj xeeb. Yog tias koj cov kua nyob ntawm qhov kub sib txawv, qhov ntom ntawm cov kua yuav tsis phim qhov ntsuas ntawm lub ntsuas dej. Qhov no yuav ua rau koj nyeem tsis raug.
Ib qho kev ntsuas ntsuas dej ib txwm yog 60 ° F (16 ° C). Koj tuaj yeem siv tus pas ntsuas kub los ntsuas qhov kub ntawm koj cov kua, thiab tom qab ntawd ua kom sov lossis txias raws li xav tau
Kauj Ruam 3. Muab lub ntsuas dej tso rau hauv cov kua
Lub ntsuas dej yog lub raj iav tshwj xeeb uas muaj qhov hnyav kawg. Muab nws tso rau hauv cov dej nrog qhov hnyav kawg. Tso cai rau tus ntsuas dej ntsuas kom nyob ntsiag to thiab tsum tsis txhob thab plaub ua ntej nyeem ntawv.
Kauj Ruam 4. Nyeem qhov tshwj xeeb ntawm lub ntsuas dej
Lub ntsuas dej tau cim nrog qhov sib txawv tshwj xeeb ntawm kev ntsuas lub ntiaj teb ntawm qhov sib txawv. Thaum nws nres ntab, kab dej yuav nyob ntawm ib qho ntawm cov cim no. Tus lej sib raug rau lub cim no yog qhov nqus tshwj xeeb ntawm koj cov kua.
- Kev nyeem ntawv ntawm lub ntsuas dej feem ntau yog cov lej, tab sis nws tau muab los ua qhov sib piv ntawm qhov ntom ntawm koj cov kua rau qhov ntom dej ntawm qhov ntsuas kub. Hauv lwm lo lus, yog tias koj lub ntsuas ntsuas dej nyeem 1.1, qhov ntawd txhais tau tias koj cov kua tau 1.1 npaug raws li dej ntawm qhov kub ntawd. Nco ntsoov tias lub ntiajteb txawj nqus tshwj xeeb yog ntsuas tsis muaj ib chav.
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Koj tuaj yeem saib xyuas qhov nqus tshwj xeeb ntawm qee yam kua. Piv txwv tau teev tseg hauv qab no:
- Acetic Acid: 1.052 Cov
- Acetone: 0.787
- Npias: 1.01
- Bromine: 3.12
- Yog ': 1,035
- Hnub Nyoog: 13.633
Txoj Kev 2 ntawm 3: Xam Kev Nyuaj Siab Tshwj Xeeb los ntawm Qhov hnyav
Kauj Ruam 1. Ua kom hnyav rau cov kua hauv nqe lus nug
Ua ntej, ua ntej ntsuas lub ntim. Tom ntej no, nqa qhov hnyav ntawm lub ntim dua, tab sis lub sijhawm no nrog cov ntim tshwj xeeb ntawm koj cov kua hauv. Tshem tawm qhov hnyav ntawm lub ntim ntim kua los ntawm qhov hnyav ntawm lub ntim khoob. Qhov sib txawv yog qhov hnyav ntawm koj cov kua.
- Piv txwv, yog tias koj lub ntim hnyav 1.50 phaus nrog kua hauv nws thiab 1.00 phaus khoob, koj qhov sib npaug yuav zoo li no: "1.50 lb - 1.00 lb = 0.50 lb." Koj cov kua hnyav 0.50 phaus.
- Nco ntsoov tias qhov kub ntawm koj cov kua tau sau tseg thaum ntsuas qhov hnyav no. Koj yuav tsum muab piv rau dej ntawm qhov kub ib yam.
Kauj Ruam 2. Tau qhov hnyav ntawm cov dej uas zoo ib yam
Sau lub khob ntim rau tib lub ntim. Tom qab ntawd, ntsuas lub ntim thiab nrhiav qhov hnyav ntawm cov dej ntawd. Koj yuav tsum tsis tas yuav hnyav lub ntim ua ntej, vim tias koj twb paub qhov hnyav ntawm lub ntim tas lawm.
- Siv tib lub mis kom pom qhov hnyav ntawm cov dej. Yog tias lub ntim ntim kua hnyav 1.75 phaus, qhov sib npaug yuav zoo li no: "1.75 lb - 1.00 lb = 0.75 lb." Hauv qhov piv txwv no, dej hnyav 0.75 phaus.
- Nco ntsoov tias cov dej nyob ntawm qhov kub ib yam nkaus li cov kua hauv nqe lus nug. Txwv tsis pub, cov txiaj ntsig yuav tsis raug.
Kauj Ruam 3. Xam qhov sib piv ntawm cov kua qhov hnyav rau qhov hnyav ntawm cov dej
Txij li thaum koj tab tom faib ib qhov hnyav los ntawm lwm qhov, cov koog yuav tshem tawm. Qhov no ua rau lub ntiajteb txawj nqus tshwj xeeb tsis suav nrog ntsuas. Siv qhov piv txwv "W.l / W.dej"Qhov twg W.l yog qhov hnyav ntawm koj cov kua thiab Wdej yog qhov hnyav ntawm dej.
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Piv txwv li, yog tias koj hnyav 100 mL ntawm acetone ntawm 25 degrees Celsius, nws yuav hnyav 0.17314 phaus. Qhov hnyav tib ntim dej ntawm qhov kub tib yam yuav ua rau koj 0.22 phaus. Txhawm rau nrhiav qhov tshwj xeeb ntawm qhov acetone no, koj yuav daws 0.17314lbs/0.22lbs = 0.787 { displaystyle 0.17314lbs/0.22lbs = 0.787}
. This is the specific gravity of acetone.
Method 3 of 3: Calculating Specific Gravity by Density
Kauj Ruam 1. Tau txais qhov ceev rau cov kua hauv nqe lus nug
Qhov ntom ntawm cov khoom sib npaug rau nws qhov hnyav faib los ntawm nws qhov ntim. Koj tuaj yeem ntsuas qhov hnyav ntawm qhov ntsuas thiab sau qhov ntim ntawm cov kua siv. Siv qhov sib npaug "m / v = D" qhov twg m yog qhov hnyav hauv grams lossis kilograms, v yog ntim hauv milliliters lossis litres, thiab D yog qhov ntom ntom.
- Piv txwv li, yog tias koj muaj tus qauv uas yog 8 grams thiab 9 milliliters, koj qhov sib npaug yuav yog: "8.00 g / 9.00 mL = 0.89 g / mL."
- Ntsuas lub ntim khoob ua ntej thiab sau nws qhov hnyav. Tom ntej, sau koj lub ntim nrog cov kua uas xav tau thiab hnyav dua. Qhov hnyav ntawm koj cov kua yog sib npaug rau qhov ntsuas thib ob rho tawm thawj zaug. Piv txwv li, yog tias lub ntim ntim tau hnyav 2.00 lbs thiab lub thawv ntim tau hnyav 0.75 lbs, qhov sib npaug yuav yog: "2.00 - 0.75 = 1.25" thiab cov kua yuav hnyav 1.25 lbs.
Kauj Ruam 2. Tau txais qhov ntom ntawm qhov ntim dej ib yam
Nruab nrab ntawm -10 degrees Celsius thiab +30 degrees Celsius, qhov ntom ntawm cov dej tuaj yeem muab sib npaug rau 1.00 (piv txwv tias 3 tus lej tseem ceeb). Yog tias koj siv cov kua uas tsis poob rau qhov ntsuas kub ntawd, koj tuaj yeem ntsuas qhov hnyav thiab qhov ntim ntawm koj cov dej thiab suav qhov ntom ntom. Xwb, koj tuaj yeem pom cov kab kos nrog qhov ntom dej ntawm qhov kub sib txawv.
Nws yog ib qho tseem ceeb kom nrhiav qhov ntom ntawm cov dej uas yog qhov kub ib yam li cov kua txhawm rau txhawm rau ntsuas qhov raug
Kauj Ruam 3. Khaws koj cov kua kom sov tib yam
Cov tshuaj nthuav tawm thaum lawv sov thiab cog lus thaum lawv txias. Txij li qhov ntom ntom ntom ntom yog ntsuas qhov hnyav npaum li cas nyob hauv ib qho ntim, qhov kev ntsuas tau hloov pauv los ntawm kev nthuav dav thiab kev sib cog vim qhov kub.
Yog tias koj xav kom tau txais kev suav tshwj xeeb lub ntiajteb txawj nqus, nws yog qhov tsim nyog uas cov kua koj tab tom ntsuas thiab cov dej uas koj siv los ua qhov sib piv yog ob qho tib si ntawm qhov kub ib yam
Kauj Ruam 4. Xam qhov sib piv ntawm cov kua ua kom ntom ntom ntawm cov dej
Cov koog yuav tshem tawm hauv qhov kev ua zauv no, ua rau koj tsis muaj nuj nqis. Tus lej ntawd yog lub ntiajteb txawj nqus tshwj xeeb (lossis txheeb ze sib npaug) ntawm koj cov kua. Qhov piv siv yuav yog "D.l / Ddej"Qhov twg Dl yog qhov ntom ntawm koj cov kua thiab D.dej yog qhov ntom ntawm koj cov dej.
Piv txwv li, yog tias koj yuav tsum ntsuas qhov hnyav ntawm acetone (0.787 g/mL @ 25 degrees C) thiab faib nws los ntawm qhov ntom dej (1.00 g/mL @ 25 degrees C), koj yuav tau 0.787g/mL/1.00 g/ml = 0.787 { displaystyle 0.787g/mL/1.00g/mL = 0.787}
tips
- specific gravity will be equal to the magnitude (the number without units) of density under circumstances where the density of water is equal to one.
- using liquids at room temperature will make it easier to control temperature variations between the liquid in question and the water.
- specific gravity of any liquid can be tested with the help of a digital specific gravity balance. the scale uses the difference between the weight of a sample in air and the weight in water to determine specific gravity.
