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Penentuan Kadar Nitrogen Fosfor dan Kalium dari Serat Pelepah Sagu (Metroxylon sago) Hesti; Rahmanpiu; Ratna
Sains: Jurnal Kimia dan Pendidikan Kimia Vol. 12 No. 1 (2023): EDISI JUNI 2023
Publisher : Jurusan Pendidikan Kimia FKIP Universitas Halu Oleo, Jl. HEA. Mokodompit Kampus Hijau Bumi Tridharma Andounohu Kendari, Gedung MIPA FKIP UHO Sulawesi Tenggara – Indonesia

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Abstract

Research has been carried out to determine the levels of nitrogen, phosphorus, and potassium from sago midrib fiber (metroxylon sago). This study aims to determine the levels of nitrogen, phosphorus, and potassium from sago midrib fiber and its feasibility as a planting medium. The result of the nitrogen content using the kjeldahl method were carried out in three stages, namely the destruction stage, the distillation stage and the titration stage with a concentration of 0,21%. Result of phosphorus content by UV-Vis spectrofotometer method is 0,06%. Then the result of potassium levels using the atomic absorption spectrofotometer (AAS) method were 0,0615. From the result obtained, the content of the sago midrib fiber does not meet the requirements as a growing medium used today. However, sago midrib fiber has the potential as a growing medium used today because it contains NPK nutrients, although in very low amounts.
Penentuan Kadar NPK (Nitrogen, Fosfor dan Kalium) dari Pelepah Aren (Arenga Pinnata M.) Hesti; Rahmanpiu; La Rudi
Sains: Jurnal Kimia dan Pendidikan Kimia Vol. 12 No. 1 (2023): EDISI JUNI 2023
Publisher : Jurusan Pendidikan Kimia FKIP Universitas Halu Oleo, Jl. HEA. Mokodompit Kampus Hijau Bumi Tridharma Andounohu Kendari, Gedung MIPA FKIP UHO Sulawesi Tenggara – Indonesia

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Research has been carried out to determine the levels of NPK (Nitrogen, Phosphorus and Potassium) in the palm fronds (Arenga pinnata M.). Palm fronds can be used as a growing medium. One indicator of a material that can be used as a growing medium is the availability of nutrients. So the purpose of this study was to determine the feasibility of the palm midrib (Arenga pinnata M.) to be used as a growing medium. The method used to determine the levels of NPK (Nitrogen, Phosphorus and Potassium) used a different method. Determination of nitrogen content was determined using the Kjeldahl method, phosphorus using the UV-Vis Spectrophotometer method and potassium using the Atomic Absorption Spectrophotometer method. Based on the results of research conducted, on the palm fronds, the results obtained with nitrogen levels of 0.171%, Phosphorus of 1.826% and Potassium of 0.0022%. From the results of these studies that meet the requirements as a planting medium is Phosphorus so that the palm fronds can be recommended to be used as a planting medium.
Analisis Kualitas Soal Ujian Akhir Semester Mata Pelajaran Kimia SMA Negeri 1 Napabalano Mustika Lestari; Rustam Musta; Rahmanpiu
Sains: Jurnal Kimia dan Pendidikan Kimia Vol. 12 No. 2 (2023): EDISI DESEMBER 2023
Publisher : Jurusan Pendidikan Kimia FKIP Universitas Halu Oleo, Jl. HEA. Mokodompit Kampus Hijau Bumi Tridharma Andounohu Kendari, Gedung MIPA FKIP UHO Sulawesi Tenggara – Indonesia

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Telah dilakukan penelitian “Analisis Kualitas Butir Soal Ujian Akhir Semester (UAS) dengan Membandingkan Kualitas Soal 3 Tahun Terakhir pada Mata Pelajaran Kimia Kelas XI MIA Semester Ganjil T.A 2020/2021-2022/2023 di SMA Negeri 1 Napano Kusambi”. Penelitian ini bertujuan mengetahui kesesuaian soal UAS dengan tujuan pembelajaran dan distribusi kognitif taksonomi Bloom. Objek penelitian seluruh soal UAS buatan guru kimia kelas XI MIA semester ganjil selama 3 tahun. Pengumpulan data dengan teknik dokumentasi dan dianalisis secara deskriptif. Hasil penelitian menunjukkan 86% soal UAS T.A 2020/2021-2022/2023 sesuai tujuan pembelajaran, sedangkan 14% tidak sesuai. Berdasarkan tingkat Taksonomi Bloomnya, soal T.A 2020/2021 dan 2021/2022 menunjukkan klasifikasi LOTS 43%, MOTS 57%, dan HOTS 0%. Soal UAS T.A 2022/2023, 43% LOTS, 43% MOTS, dan 14% HOTS. Soal UAS buatan guru belum mengacu pada tujuan pembelajaran dan didominasi soal mudah.
Co-Authors Hesti La Rudi Mustika Lestari Ratna Rustam Musta