Viscocity Flashcards

1
Q

Viskositas adalah…

A

Suatu jumlah yangmenggambarkan ketahanan fluida untuk mengalir

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2
Q

Arti lain dari viskositas adalah…

A

Gaya gesekan internal fluida

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3
Q

Pada zat cair, viskositas disebabkan adanya gaya…

A

Gaya kohesi (gaya tarik menarik antara molekul sejenis)

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4
Q

Pada zat gas, viskositas disebabkan karena adanya…

A

Tumbukan antara molekul

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5
Q

Temperatur naik maka viskositas gas akan…

A

Naik

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6
Q

Temperatur naik maka viskositas cair akan…

A

Turun

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7
Q

Tekanan naik maka viskositas cair akan…

A

Naik

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8
Q

Jelaskan faktor-faktor yang mepengaruhi viskositas!

A
  1. Konsentrasi (makin besar, viskositas naik)
  2. Temperatur (makin besar, cair turun, gas naik)
  3. Muatan (perbedaan potensial yang menyebabkan perbedaan dari gaya internal)
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9
Q

Sebutkan cara pengukuran viskositas!

A
  1. Ostwald
  2. Falling Sphere
  3. Geometries
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10
Q

Sebutkan dan jelaskan penggolongan tipe aliran!

A
  1. Newton (Cairan ideal e.g. pelarut)

2. Non-Newton (BM tinggi e.g. suspensi koloid emulsi)

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11
Q

Sebutkan aplikasi viskositas di bidang farmasi!

A
  1. Mengetahui viskositas dan sifat alir dari berbagai sediaan farmasi e.g. sediaan suspensi dan emulsi
  2. Pengaruh rheology terhadap bentuk sediaan
  3. Pengaruh rheology terhadap bioavailabilitas sediaan
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12
Q

Sebutkan uji stabilitas pada viskositas!

A
  1. Cream
  2. Lotion
  3. Emulsi
  4. Gel
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13
Q

Sebutkan manfaat viskositas dalam bidang kesehatan!

A

Diagnosa melalui darah dan kelenjar sekresi

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