Ka Hoʻoholo ʻana i ka Chloride i loko o ka Food Grade Sodium CMC

Hiki ke hana ʻia ka hoʻoholo ʻana o ka chloride i ka sodium carboxymethyl cellulose (CMC) me ka hoʻohana ʻana i nā ʻano analytical like ʻole. Maʻaneʻi, e wehewehe au i kahi ʻano hana maʻamau, ʻo ia ke ʻano Volhard, ʻike ʻia hoʻi ʻo ke ʻano Mohr. Hoʻopili kēia ʻano hana i ka titration me ka solution silver nitrate (AgNO3) ma ke alo o ka mea hōʻailona potassium chromate (K2CrO4).

Eia ke kaʻina hana no ka hoʻoholo ʻana i ka chloride i ka sodium CMC meaʻai me ka hoʻohana ʻana i ke ʻano Volhard:

Nā mea a me nā mea hana hou:

1. ʻO ka laʻana sodium carboxymethyl cellulose (CMC).
2. ʻO ke kala nitrate (AgNO3) solution (maʻamau)
3. ʻO ka hoʻonā hōʻike hōʻikeʻike potassium chromate (K2CrO4).
4. ʻAka Nitric (HNO3) solution (dilute)
5. Wai hoʻoheheʻe
6. 0.1 M ka pāpaʻi sodium chloride (NaCl) solution (mea maʻamau)

Mea lako:

1. Kaulike analytical
2. Puke volumetric
3. Burette
4. Pahu Erlenmeyer
5. Pipettes
6. Mea hoʻoheheʻe magnetic
7. pH mika (koho)

Kaʻina hana:

1. E kaupaona pololei ma kahi o 1 kalama o ka hāpana sodium CMC i loko o ka pahu Erlenmeyer 250 mL maʻemaʻe a maloʻo.
2. E hoʻohui ma kahi o 100 mL o ka wai i hoʻomaʻemaʻe ʻia i ka pahu a hoʻoulu a hiki i ka pau ʻana o ka CMC.
3. E hoʻohui i kekahi mau kulu o ka solution indicator potassium chromate i ka ipu. Pono e lilo ka hopena i melemele maʻemaʻe.
4. E hoʻokaʻawale i ka haʻina me ka solution kālā nitrate maʻamau (AgNO3) a hiki i ka ʻike ʻia ʻana o kahi ʻeke ʻulaʻula ʻulaʻula o ke kala chromate (Ag2CrO4). Hōʻike ʻia ka hopena e ka hoʻokumu ʻana o kahi ʻulaʻula-ʻulaʻula paʻa mau.
5. E hoʻopaʻa i ka nui o ka solution AgNO3 i hoʻohana ʻia no ka titration.
6. E hana hou i ka titration me nā laʻana hou o ka hāʻina CMC a hiki i ka loaʻa ʻana o nā hopena concordant (ʻo ia hoʻi, nā puke titration kūlike).
7. E hoʻomākaukau i kahi hoʻoholo hakahaka me ka hoʻohana ʻana i ka wai hoʻoheheʻe ʻia ma kahi o ka laʻana CMC no ka helu ʻana i nā chloride i loko o nā reagents a i ʻole nā ​​​​mea aniani.
8. E helu i ka maʻiʻo chloride i loko o ka hāpana sodium CMC me ka hoʻohana ʻana i kēia ʻano hana:

Ma hea:

• $�$

  V = ka nui o ka solution AgNO3 i hoʻohana ʻia no ka titration (ma ka mL)

• $�$

  N = maʻamau o ka hoʻonā AgNO3 (i loko o ka mol/L)

• $�$

  M = molarity o ka hopena maʻamau NaCl (i ka mol/L)

• $�$

  W = ke kaumaha o ka hāpana sodium CMC (ma ka g)

Nānā: ʻO ke kumu
$35.45$

Hoʻohana ʻia ʻo 35.45 e hoʻololi i ka maʻiʻo chloride mai nā grams a i ka grams o ka chloride ion (
$��-$

Cl−).

Nā mea e mālama ai:

1. E mālama i nā kemika a pau me ka mālama pono a hoʻohana i nā lako pale pilikino kūpono.
2. E hōʻoia i ka maʻemaʻe a me ka maloʻo o nā mea aniani a pau e pale aku i ka haumia.
3. E hoʻohālikelike i ka solution nitrate kālā me ka hoʻohana ʻana i ka mea maʻamau e like me ka solution sodium chloride (NaCl).
4. E hana mālie i ka titration kokoke i ka hopena e hōʻoia i nā hopena pololei.
5. E hoʻohana i ka mea hoʻoheheʻe magnetic e hōʻoia i ka hui ʻana o nā hopena i ka wā titration.
6. E hana hou i ka titration e hōʻoia i ka pololei a me ka pololei o nā hopena.

Ma ka hahai ʻana i kēia kaʻina hana, hiki iā ʻoe ke hoʻoholo i ka ʻike chloride i loko o ka sodium carboxymethyl cellulose (CMC) me ka pololei a me ka hilinaʻi, e hōʻoia ana i ka hoʻokō ʻana i nā kūlana maikaʻi a me nā koi hoʻoponopono no nā mea hoʻohui meaʻai.