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Kayadoe, Victor
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Chemistry Education

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ANALISIS BUTIR SOAL TES AKHIR SEMESTER (TAS) KIMIA SMA NEGERI II AMBON TAHUN PELAJARAN 2014/2015 Al Hamid, Fatma; Manoppo, Yance; Kayadoe, Victor
Molluca Journal of Chemistry Education (MJoCE) Vol 8 No 2 (2018): Molluca Journal of Chemistry Education (MJoCE)
Publisher : Prodi Pendidikan Kimia FKIP Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/MJoCEvol8iss2pp89-93

Abstract

The aims of this research was to analyze the exam questions in the end of semester tests SMA Negeri II Ambon year of 2014/2015. The item tests was analized include the validity, reliability, power of difficulty, discrimination power, and distractor effective. This research type was kuantitative descriptive method and the data was analyzed by using Item and Test Analysis (Iteman) Program. Subjects of this research are test instrument and student answer results of chemical tests at odd semester class X SMA Negeri II Ambon year. Documentation technik was used to collect data. Results of the analysis showed that the quality which was seen from the validity, there were 80% of questions which were valid and the rest there were 20% were invalid. Reliability indeks is 0,733. From the level of difficulty, there were 8 easy questions, 22 medium questions, and 20 hard question. From the discrimination power, there were 42 questions or 84% questions which had good discrimination power and there were 8 or 16% questions which had low and negative. Meanwhile from the answer patterns, it is known that 60% destructor in the questions were function properly and 40% were function unproperly
KINERJA ARGININ SEBAGAI INHIBITOR KOROSI BAJA SS-304 DALAM LARUTAN HCL Kayadoe, Victor; Kayadoe, Rita; Sunarti, Sunarti
Molluca Journal of Chemistry Education (MJoCE) Vol 8 No 2 (2018): Molluca Journal of Chemistry Education (MJoCE)
Publisher : Prodi Pendidikan Kimia FKIP Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/MJoCEvol8iss2pp103-112

Abstract

The Research has been conducted to study the corrosion inhibition of SS-304 in HCl solution using arginine on pickling process by weight loss methods. The Research carried out by variation of arginine concentration and temperature to determine its effect on inhibition efficiency and corrosion rate of SS-304. The results showed that the inhibition efficiency increases with increasing inhibitor concentration. Optimum inhibition efficiency was obtained at 0.0125 M (56.40 %), with corrosion rate of 1,18 mmy-1. In contrast, higher temperatures result in decreased inhibition efficiency up to 14.62 % at temperature of 55oC, with corrosion rate of 12,18 mmy-1.
Co-Authors Al Hamid, Fatma Kayadoe, Rita Sunarti Yance Manoppo