Latihan Soal Penggunaan Spektrofotometer Vis

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| By Branifit
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Branifit
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Quizzes Created: 1 | Total Attempts: 2,041
Questions: 10 | Attempts: 2,045

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Latihan Soal Penggunaan Spektrofotometer Vis - Quiz


Questions and Answers
  • 1. 

    Berikut ini yang merupakan alat yang digunakan analisa yang merupakan bagian dari analisa instrumen yang didasarkan pada pengukuran absorbansi cahaya oleh suatu zat yaitu…

    • A.

      Spektrofotometri

    • B.

      Spektrofotometer

    • C.

      Kromatografi

    • D.

      Kromatogram

    Correct Answer
    B. Spektrofotometer
    Explanation
    A spektrofotometer is an instrument used for analyzing and measuring the absorbance of light by a substance. It is a part of instrumental analysis and is based on the principle of spectrophotometry. Spectrophotometry involves the measurement of the intensity of light that is absorbed by a sample at different wavelengths. A spectrophotometer is used to measure the absorbance of a sample at specific wavelengths, which can provide information about the concentration or composition of the substance being analyzed. Therefore, a spektrofotometer is the correct answer as it is the instrument used for the analysis described in the question.

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  • 2. 

    Kuvet yang dapat digunakan untuk analisa kuantitatif dengan spektrofotometer vis  terbuat dari…

    • A.

      Kuarsa

    • B.

      Keramik

    • C.

      Alumunium

    • D.

      Platina

    Correct Answer
    A. Kuarsa
    Explanation
    Kuarsa dapat digunakan untuk analisa kuantitatif dengan spektrofotometer vis karena kuarsa memiliki sifat transparan terhadap cahaya yang melalui spektrofotometer. Kuarsa juga memiliki sifat tahan terhadap korosi dan reaksi kimia, sehingga tidak akan bereaksi dengan sampel yang dianalisis. Hal ini memungkinkan kuarsa untuk memberikan hasil yang akurat dan konsisten dalam analisa kuantitatif dengan spektrofotometer vis.

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  • 3. 

    Berikut ini yang harus diperhatikan ketika menempatkan spektrofotometer yaitu..

    • A.

      Letakan di tempat yang berdebu

    • B.

      Letakan di tempat yang lembab

    • C.

      Letakan ditempat yang permukaan yang datar

    • D.

      Letakan di tempat yang dekat medan magnet

    Correct Answer
    C. Letakan ditempat yang permukaan yang datar
    Explanation
    The correct answer states that the spectrophotometer should be placed on a flat surface. This is important because placing it on a flat surface ensures stability and accuracy in the measurements. If the spectrophotometer is placed on an uneven or sloping surface, it can affect the alignment of the light source and detector, leading to inaccurate readings. Additionally, a flat surface helps to minimize vibrations and disturbances that can interfere with the measurements.

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  • 4. 

    Dalam manual penggunaan spektofotometer genesys, sebelum menggunakan spektrofotometer visible, sebaiknya spektrofotometer perlu dihidupkan terlebih dahulu selama…

    • A.

      5 menit

    • B.

      10 menit

    • C.

      20 menit

    • D.

      30 menit

    Correct Answer
    A. 5 menit
    Explanation
    Based on the given information, the correct answer is 5 minutes. The explanation is that before using the visible spectrophotometer, it is recommended to turn it on for a certain period of time. In this case, the recommended time is 5 minutes. This is likely to allow the spectrophotometer to warm up and stabilize, ensuring accurate and reliable measurements.

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  • 5. 

    Panjang gelombang sinar tampak yang umumnya digunakan untuk analisa dengan spektrofotometer vis yaitu pada rentang…

    • A.

      0 - 200 nm

    • B.

      200 - 400 nm

    • C.

      400 - 800 nm

    • D.

      800 - 1200 nm

    Correct Answer
    C. 400 - 800 nm
    Explanation
    The correct answer is 400 - 800 nm. This is because the visible light spectrum ranges from approximately 400 to 800 nm. Spectrophotometers are used to analyze the absorption, transmission, and reflection of light by a sample, and they are commonly used in the visible range of the electromagnetic spectrum. Therefore, the wavelength range of 400 - 800 nm is the most suitable for analysis with a visible spectrophotometer.

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  • 6. 

    Tombol yang digunakan untuk mengatur panjang gelombang pada spektrofotometer genesys 20 yaitu…

    • A.

      Option 1

    • B.

      Option 2

    • C.

      Option 3

    • D.

      Option 4

    Correct Answer
    C. Option 3
    Explanation
    The correct answer is Option 3. This option is the one that is used to adjust the wavelength on the genesys 20 spectrophotometer.

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  • 7. 

    Berikut ini merupakan pengaturan yang akan muncul ketika menekan tombol utility, kecuali...

    • A.

      Pengaturan tempat sel

    • B.

      Pengaturan bahasa

    • C.

      Pengaturan unit konsentrasi

    • D.

      Pengaturan panjang gelombang mula-mula

    Correct Answer
    A. Pengaturan tempat sel
    Explanation
    The given options are all settings that will appear when pressing the utility button, except for the "pengaturan tempat sel" (cell location setting). This suggests that the "pengaturan tempat sel" is not a setting that is accessed through the utility button.

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  • 8. 

    Berikut ini yang harus diperhatikan ketika menggunakan kuvet, yaitu…

    • A.

      Larutan dalam kuvet harus mengandung gelembung

    • B.

      Kuvet tidak boleh dibilas menggunakan larutan yang akan diukur

    • C.

      Bagian bening dari kuvet harus terkena tapak dari telapak tangan

    • D.

      Kuvet dimasukan dalam sample holder bagian bening dari kuvet searah dengan tanda panah

    Correct Answer
    D. Kuvet dimasukan dalam sample holder bagian bening dari kuvet searah dengan tanda panah
    Explanation
    When using a cuvette, it is important to insert it into the sample holder with the clear part of the cuvette facing the same direction as the arrow. This ensures that the cuvette is correctly aligned and the measurements are accurate.

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  • 9. 

    Berikut ini yang merupakan perawatan rutin spektrofotometer GENESYS 20 yang perlu dilakukan yaitu...

    • A.

      Mengganti lampu setiap kali akan mengggunakan alat

    • B.

      Mengelap alat segera jika ada tumpahan

    • C.

      Menyimpan alat dilemari asam

    • D.

      Melepas sekring setiap selesai menggunakan alat

    Correct Answer
    B. Mengelap alat segera jika ada tumpahan
    Explanation
    It is important to wipe the instrument immediately if there is any spillage to prevent any damage or contamination.

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  • 10. 

    Berikut ini yang merupakan salah satu hal yang menyebabkan alat mengalami error yaitu...

    • A.

      Memanaskan alat sebelum digunakan

    • B.

      Menutup tempat sampel ketika menyalakan alat

    • C.

      Alat dilap dengan kain yang lembut

    • D.

      D. Sampel terlalu pekat

    Correct Answer
    B. Menutup tempat sampel ketika menyalakan alat
    Explanation
    One of the possible causes of the error is closing the sample compartment when turning on the device. This could lead to a build-up of pressure or interference with the internal mechanisms of the device, resulting in an error. It is important to follow the proper procedures and instructions when using any equipment to avoid such errors.

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  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Feb 01, 2017
    Quiz Created by
    Branifit
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