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Meida E. Marpaung
Universitas Tadulako
Chemistry Education

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Improvement Physics 1 of Chemistry Learning Outcomes Through Project-Based Learning Models (PjBL) Using Quizizz Online Learning Media Leony S. L. Purba; Meida E. Marpaung; Nelius Harefa; Anugrah Purba
Jurnal Akademika Kimia Vol. 10 No. 3 (2021)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (204.832 KB) | DOI: 10.22487/j24775185.2021.v10.i3.pp203-207

Abstract

Improving cognitive abilities, namely learning outcomes is one of the objectives of learning. Learning outcomes can be improved through the use of creative, innovative learning models in accordance with the current curriculum, the 2013 revised curriculum. This study aims to determine whether there is an increase in Physics Chemistry Learning Outcomes 1 through the Project-based Learning (PjBL) Learning Model using Quizizz online learning media. Based on the results of the normality and homogeneity test, the data is normally distributed with the value of the normality test result of 0.638 (sig 0.05) and homogeneous with the homogeneity test result value of 0.144 (sig 0.05). The results of statistical analysis of research data using the paired t-test hypothesis test results obtained tcount = 17,685 (sig 0.00) and ttable = 0.684 (sig 0.05), it is concluded that there is an increase in learning outcomes in Physics Chemistry 1 through the Project-based Learning (PjBL) learning model using Quizizz online learning media because tcount˃ ttable. A further test is the gain test, to determine the level of improvement in learning outcomes. The results of the analysis using the gain test, the gain value of 42.51%, with the medium category.
Adsorption of Fe(III) Ion in Tablets Fe Supplement by Black Tea Dregs and its Application in Inorganic Chemistry Learning Yuli Nurmayanti; Detris Poba; Meida E. Marpaung
Jurnal Akademika Kimia Vol. 11 No. 3 (2022)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2022.v11.i3.pp197-201

Abstract

The study of the adsorption of Fe(III) ion in Fe supplement by black tea dregs has been done. This study aims to investigate: (a) the Adsorption ability of Fe(III) ion in Fe supplement by black tea dregs (b) the Analysis result of Fe(III) amounts in a sample of Fe supplement when using black tea dregs. Several parameters were analyzed, such as; water and ash contents of the adsorbent, the optimum time, and the concentration of ion Fe(III) with tea dregs in a buffer medium (pH 4,8). The analysis of sample solution concentration of Fe(III) in this study using Genesys spectrophotometry at 590 nm. The result showed that the water and ash contents were 3.03 % and 0.9 %, respectively. Small percentages indicate that the adsorbent has met the standard (SNI) 06–3730-1995. The time and concentration optimum adsorption of Fe(III)-tea dregs were 60 minutes and 100 mg/L, respectively. The result of the adsorption ability of Fe(III) ion in Fe supplement by tea dregs was 70.4% with the adsorption concentration of ion Fe(III) were 7.07 mg/L. The research results obtained can be used as teaching materials for inorganic chemistry learning, and as a reference for new materials in the field of coordination chemistry and materials.
Improvement Physics 1 of Chemistry Learning Outcomes Through Project-Based Learning Models (PjBL) Using Quizizz Online Learning Media Leony S. L. Purba; Meida E. Marpaung; Nelius Harefa; Anugrah Purba
Jurnal Akademika Kimia Vol. 10 No. 3 (2021)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2021.v10.i3.pp203-207

Abstract

Improving cognitive abilities, namely learning outcomes is one of the objectives of learning. Learning outcomes can be improved through the use of creative, innovative learning models in accordance with the current curriculum, the 2013 revised curriculum. This study aims to determine whether there is an increase in Physics Chemistry Learning Outcomes 1 through the Project-based Learning (PjBL) Learning Model using Quizizz online learning media. Based on the results of the normality and homogeneity test, the data is normally distributed with the value of the normality test result of 0.638 (sig 0.05) and homogeneous with the homogeneity test result value of 0.144 (sig 0.05). The results of statistical analysis of research data using the paired t-test hypothesis test results obtained tcount = 17,685 (sig 0.00) and ttable = 0.684 (sig 0.05), it is concluded that there is an increase in learning outcomes in Physics Chemistry 1 through the Project-based Learning (PjBL) learning model using Quizizz online learning media because tcount˃ ttable. A further test is the gain test, to determine the level of improvement in learning outcomes. The results of the analysis using the gain test, the gain value of 42.51%, with the medium category.
Adsorption of Fe(III) Ion in Tablets Fe Supplement by Black Tea Dregs and its Application in Inorganic Chemistry Learning Yuli Nurmayanti; Detris Poba; Meida E. Marpaung
Jurnal Akademika Kimia Vol. 11 No. 3 (2022)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2022.v11.i3.pp197-201

Abstract

The study of the adsorption of Fe(III) ion in Fe supplement by black tea dregs has been done. This study aims to investigate: (a) the Adsorption ability of Fe(III) ion in Fe supplement by black tea dregs (b) the Analysis result of Fe(III) amounts in a sample of Fe supplement when using black tea dregs. Several parameters were analyzed, such as; water and ash contents of the adsorbent, the optimum time, and the concentration of ion Fe(III) with tea dregs in a buffer medium (pH 4,8). The analysis of sample solution concentration of Fe(III) in this study using Genesys spectrophotometry at 590 nm. The result showed that the water and ash contents were 3.03 % and 0.9 %, respectively. Small percentages indicate that the adsorbent has met the standard (SNI) 06–3730-1995. The time and concentration optimum adsorption of Fe(III)-tea dregs were 60 minutes and 100 mg/L, respectively. The result of the adsorption ability of Fe(III) ion in Fe supplement by tea dregs was 70.4% with the adsorption concentration of ion Fe(III) were 7.07 mg/L. The research results obtained can be used as teaching materials for inorganic chemistry learning, and as a reference for new materials in the field of coordination chemistry and materials.
Co-Authors AA Sudharmawan, AA Anugrah Purba Detris Poba Leony S. L. Purba Nelius Harefa Yuli Nurmayanti