The Logol solution is a kind of fixatives for storage of phytoplankton translation - The Logol solution is a kind of fixatives for storage of phytoplankton Indonesian how to say

The Logol solution is a kind of fix

The Logol solution is a kind of fixatives for storage of phytoplanktons in the
field studies. It is known that a 200 mL Logol-solution contains 20 g of KI, 10 g
of I , 10 mL of glacial acetic acid, and 2.5 % of formaldehyde. Commercial
2
formalin, containing formaldehyde near 40 %, is used for making the Logol
solution. Therefore, if one wants to use formalin to prepare a 200 mL Logol-
solution, one needs X ml of formalin. Robert prepared an incorrect 200 mL
Logol-solution by mistaking the percentage of formaldehyde in formalin for 100
%. He tried to remedy this incorrect Logol-solution by adding more solutions to
make it to be a 400 mL Logol solution. He first added some water to the incorrect
Logol-solution, and then he added 20 g KI, 10 g I , 10 mL glacial acetic acid, and
2
Y mL formalin. Finally, he added more water so that the total volume of the
solution is 400 mL exactly. What are X and Y ?
(A) 5, 10
(B) 12.5, 12.5
(C) 12.5, 20
(D) 12.5, 25
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The Logol solution is a kind of fixatives for storage of phytoplanktons in the field studies. It is known that a 200 mL Logol-solution contains 20 g of KI, 10 g of I , 10 mL of glacial acetic acid, and 2.5 % of formaldehyde. Commercial 2formalin, containing formaldehyde near 40 %, is used for making the Logol solution. Therefore, if one wants to use formalin to prepare a 200 mL Logol-solution, one needs X ml of formalin. Robert prepared an incorrect 200 mL Logol-solution by mistaking the percentage of formaldehyde in formalin for 100 %. He tried to remedy this incorrect Logol-solution by adding more solutions to make it to be a 400 mL Logol solution. He first added some water to the incorrect Logol-solution, and then he added 20 g KI, 10 g I , 10 mL glacial acetic acid, and 2Y mL formalin. Finally, he added more water so that the total volume of the solution is 400 mL exactly. What are X and Y ?(A) 5, 10(B) 12.5, 12.5(C) 12.5, 20(D) 12.5, 25
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Results (Indonesian) 2:[Copy]
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Solusi Logol adalah jenis fiksatif untuk penyimpanan fitoplankton di
studi lapangan. Hal ini diketahui bahwa 200 mL Logol-solusi mengandung 20 g KI, 10 g
I, 10 ml asam asetat glasial, dan 2,5% dari formaldehid. Komersial
2
formalin, yang mengandung formalin dekat 40%, digunakan untuk membuat Logol
solusi. Oleh karena itu, jika seseorang ingin menggunakan formalin untuk menyiapkan 200 mL Logol-
solusi, salah satu kebutuhan X ml formalin. Robert menyiapkan salah 200 mL
Logol-solusi dengan mengira persentase formalin dalam formalin untuk
100%. Dia mencoba untuk memperbaiki Logol-solusi yang salah ini dengan menambahkan lebih banyak solusi untuk
membuat itu menjadi 400 mL larutan Logol. Dia pertama kali menambahkan air ke salah
Logol-solusi, dan kemudian ia menambahkan 20 g KI, 10 g I, 10 mL asam asetat glasial, dan
2
Y mL formalin. Akhirnya, ia menambahkan lebih banyak air sehingga volume total
solusi adalah 400 mL persis. Apa X dan Y?
(A) 5, 10
(B) 12,5, 12,5
(C) 12,5, 20
(D) 12,5, 25
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