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All Journal Jurnal Sains dan Edukasi Sains LAVOISIER: Chemistry Education Journal LAVOISIER: Chemistry Education Journal
Salfiah, Salma
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Chemistry Education Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

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Implementation Of Chemistry Learning Through Guided Inquiry Using Small Scale Laboratory Media On Science Process Skills Salfiah, Salma; Hidayah, Fitria Fatichatul; Wahyuni, Endang Tri
LAVOISIER: Chemistry Education Journal Vol 3, No 2 (2024)
Publisher : UIN Syekh Ali Hasan Ahmad Addary Padangsidimpuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24952/lavoisier.v3i2.12638

Abstract

Science process skills are very important for students to have, but their optimization is still low. It requires student-centered learning, namely guided inquiry an open sexta media small scale laboratory to assist inquiry activities in schools which are still constrained in carrying out practicums in laboratories. The purpose of this study was to analyze tha level of science process skill through open inquiry learning and guided inquiry using small scale laboratory scuta media to compare the two types of quasi-experimental research conducted at Ma’arif Karangawen High School. The design used in Noneqivalent Control Group Design. Data collection techniques namely pretest/posttest and non-test namely by observation, then tested with n-gain, normality test, homogeneity test, and hypothesis testing (t-test) and non-test data analysis. So the results of science process skill with guided inquiry learning are superior to the open inquiry learning method, indicate by the higher average value of the control class using the guided inquiry metod, namely 55,58, an increase 35,58% and n-gain value of 0,44 in the medium category. The experimental class used the open method, namely 50,15, an increase of 27,57% and an n-gain value of 0,35 in the medium category.
A Case Study on The Quantitative Determination of Fluoride in Drinking Water using The Colorimetric Method with UV-Vis Spectrophotometry Nisa', Salma Alifatun; Salfiah, Salma; Arianty, Alya Dwi; Hidayah, Fitria Fatichatul
Jurnal Sains dan Edukasi Sains Vol. 8 No. 2 (2025): Jurnal Sains dan Edukasi Sains
Publisher : Faculty of Science and Mathematics, Universitas Kristen Satya Wacana, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24246/juses.v8i2p167-172

Abstract

Drinking water is something that is consumed by the general public every day. One of the contents contained in drinking water is fluoride which can have a negative impact on humans if the level exceeds 1 mg/L. The objective of this study is twofold: firstly, to identify and calculate the concentration of fluoride in bottled drinking water samples, and secondly, to determine the suitability of consuming the samples. An analysis of fluoride levels was conducted on five drinking water samples. This analysis was performed using a UV-Vis spectrophotometer at a wavelength of 570 nm. The reagent used was sodium 1-parasulfophenylazo 20-1,8-dihydroxy-3-6-naphthalene (SPADNS). The test is based on the reaction of fluoride and zirconium, which results in the absorption of colour by the former and the formation of a colourless complex anion by the latter. The observation is made indirectly by observing the reduction of the absorption of the SPADNS-zirconyl acid reagent complex, rather than the absorption of the reagent to which fluoride ions have been added. The measurement results indicate that the five samples exhibit fluoride levels below 1 mg/L, with a range of 0.054 - 0.560 mg/L. In accordance with the standards outlined in SNI 3553:2015 concerning Mineral Water, the analysed drinking water samples are deemed to be in compliance with stipulated parameters. This is due to the fact that the concentration of total dissolved solids in the water samples does not exceed 1.0 milligrams per litre (mg/L).
Implementation Of Chemistry Learning Through Guided Inquiry Using Small Scale Laboratory Media On Science Process Skills Salfiah, Salma; Hidayah, Fitria Fatichatul; Wahyuni, Endang Tri
LAVOISIER: Chemistry Education Journal Vol 3, No 2 (2024)
Publisher : UIN Syekh Ali Hasan Ahmad Addary Padangsidimpuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24952/lavoisier.v3i2.12638

Abstract

Science process skills are very important for students to have, but their optimization is still low. It requires student-centered learning, namely guided inquiry an open sexta media small scale laboratory to assist inquiry activities in schools which are still constrained in carrying out practicums in laboratories. The purpose of this study was to analyze tha level of science process skill through open inquiry learning and guided inquiry using small scale laboratory scuta media to compare the two types of quasi-experimental research conducted at Ma’arif Karangawen High School. The design used in Noneqivalent Control Group Design. Data collection techniques namely pretest/posttest and non-test namely by observation, then tested with n-gain, normality test, homogeneity test, and hypothesis testing (t-test) and non-test data analysis. So the results of science process skill with guided inquiry learning are superior to the open inquiry learning method, indicate by the higher average value of the control class using the guided inquiry metod, namely 55,58, an increase 35,58% and n-gain value of 0,44 in the medium category. The experimental class used the open method, namely 50,15, an increase of 27,57% and an n-gain value of 0,35 in the medium category.
Co-Authors Arianty, Alya Dwi Endang Tri Wahyuni Fitria Fatichatul Hidayah Nisa', Salma Alifatun