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All Journal Cakrawala Pendidikan Jurnal Penelitian Saintek Jurnal Riset Pembelajaran Kimia
AK Prodjosantoso
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Chemistry Decision Sciences, Operations Research & Management Education

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PENGAYAAN MATERI POKOK BAHASAN TERTENTU DENGAN MATERI KIMIA LINGKUNGAN AK Prodjosantoso
Jurnal Cakrawala Pendidikan CAKRAWALA PENDIDIKAN, EDISI 1,1989,TH.VIII
Publisher : LPMPP Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/cp.v1i1.7733

Abstract

Aplikasi prinsip ilmu kimia dapat membangkitkan minat siswa untuk belajar kimia. Banyak pokok bahasan dalam pelajaran IImu Kimia di SMA yang sedikit memuat aplikasi prinsip. Kimia Lingkungan merupakan salah satu pokok bahasan yang banyak berisi aplikasi prinsip ilmu kimia. Agar siswa berminat rnempelajari ilmu kimia, pokok bahasan-pokok bahasan yang sedikit memuat apIikasi prinsip dapat diperkaya dengan materi Kimia Lingkungan.
Cr-Fe KOADSORPSI BY KITOSAN Endang Widjajanti; AK Prodjosantoso
Jurnal Penelitian Saintek Vol 13, No 1: April 2008
Publisher : Institute of Research and Community Services, Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (112.095 KB) | DOI: 10.21831/jps.v13i1.185

Abstract

This study aims to determine the ability of adsorption of chitosan on Cr (III) and Fe (III) ions simultaneously in various concentration variations. As research subject is chitosan isolated from crab shells and made through three stages namely deproteination stage, demineralisasi and deasetilasi. As the object of research is the adsorption power of chitosan against Cr (III) and Fe (III) metal ions, both for each ion and simultaneously. The adsorption process using a batch system is carried out for 24 hours at room temperature under optimum pH system conditions with a 1: 100 (w / v) adsorbent ratio at concentrations of 100 ppm to 1000 ppm. Chitosan adsorption is the ratio between the amount of metal ions adsorbed per gram of chitosan, adsorbat concentration is determined using Atomic Absorption Spectrophotometer The results showed that the adsorption capacity of chitosan on Fe (III) was stronger than Cr (III) in both single adsorption and simultaneous adsorption, and the process was classified as coadsorption.
ANALISIS KELENGKAPAN ALAT, BAHAN LABORATORIUM, DAN KETERLAKSANAAN PRAKTIKUM KIMIA DI SMA NEGERI 2 YOGYAKARTA Shinta Ambarwati; AK Prodjosantoso
Jurnal Riset Pembelajaran Kimia Vol 7, No 1 (2018): Jurnal Pembelajaran Kimia
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/jrpk.v7i1.13356

Abstract

AbstrakPenelitian ini bertujuan untuk mengetahui kelengkapan alat, bahan kimia, danketerlaksanaan praktikum kimia di SMA Negeri 2 Yogyakarta. Penelitian inidilaksanakan di SMA Negeri 2 Yogyakarta. Data yang dikumpulkan menggunakaninstrumen lembar observasi, angket dan wawancara langsung dengan guru danlaboran kimia SMA Negeri 2 Yogyakarta. Analisis data kuantitatif menggunakanteknik rerata persentase dari setiap variabel, dan data kualitatif diperoleh melaluikonversi menggunakan kriteria tertentu. Hasil penelitian menunjukkan kelengkapanperalatan laboratorium kimia SMA Negei 2 Yogyakarta pada kriteria lengkap;kelengkapan bahan kimia di laboratorium kimia pada kriteria kurang lengkap; dankriteria keterlaksanaan praktikum kimia kelas X dan XI adalah sangat baik;sedangkan kriteria keterlaksanaan praktikum kimia kelas XII adalah baik.Kata Kunci : alat kimia, bahan kimia, laboratorium kimia, praktikum kimia
Co-Authors Endang Widjajanti Shinta Ambarwati