ANALISIS KONSEPSI, TROUBLESOME KNOWLEDGE, DAN THRESHOLD CONCEPT MENGGUNAKAN TES DIAGNOSTIK MODEL MENTAL THREE-TIER (TDM-THREE-TIER) PADA MATERI BATERAI

Beatrice Ruth Nathania Simanjuntak, - and Wiji, - and Tuszie Widhiyanti, - (2025) ANALISIS KONSEPSI, TROUBLESOME KNOWLEDGE, DAN THRESHOLD CONCEPT MENGGUNAKAN TES DIAGNOSTIK MODEL MENTAL THREE-TIER (TDM-THREE-TIER) PADA MATERI BATERAI. S2 thesis, Universitas Pendidikan Indonesia.

Abstract

Penelitian ini bertujuan untuk menganalisis konsepsi, troublesome knowledge, dan threshold concept mahasiswa pada materi baterai menggunakan instrumen tes diagnostik three-tier (TDM Three-Tier). Penelitian ini menggunakan pendekatan fenomenologi. Subjek penelitian adalah mahasiswa Pendidikan Kimia dari salah satu universitas negeri di Bandung. Hasil menunjukkan bahwa pada baterai alkaline, konsepsi benar meliputi: (1) seng sebagai anoda mengalami oksidasi menghasilkan Zn²⁺ yang bereaksi dengan OH⁻ membentuk Zn(OH)₂; (2) mangan dioksida sebagai katoda mengalami reduksi, elektron mengalir dari anoda ke katoda; (3) tidak dapat diisi ulang. Pada aki, konsepsi benar meliputi: (1) timbal sebagai anoda membentuk endapan PbSO₄; (2) timbal dioksida sebagai katoda membentuk endapan PbSO₄ dan massanya timbal dioksida berkurang; (3) reaksi saat charging merupakan kebalikan discharging; (4) aliran elektron berbalik saat charging. Konsepsi benar untuk konsep bahan bakar hidrogen, meliputi: (1) hidrogen sebagai anoda teroksidasi membentuk H⁺; (2) oksigen sebagai katoda membentuk air; (3) elektron mengalir dari anoda ke katoda; (4) suplai bahan bakar diperlukan. Miskonsepsi baterai alkaline meliputi: kesalahan identifikasi anoda/katoda dan perubahan massanya, arah aliran elektron yang dibalik, dapat diisi ulang. Pada aki, miskonsepsi mencakup kekeliruan posisi elektroda, perubahan massa, arah aliran elektron saat discharging/charging, dan proses charging sama seperti discharging. Pada bahan bakar hidrogen, miskonsepsi meliputi salah penempatan peran elektroda, arah aliran elektron, dapat diisi ulang, dan bahan aktif habis. Konsepsi yang tidak diketahui dasar pengambilannya pada baterai alkaline, yaitu proses reduksi/oksidasi dan penyebab habisnya daya. Pada aki, terjadi kesalahan pengaitan proses reaksi pada Pb dan PbO₂. Pada bahan bakar hidrogen, misalnya menyatakan oksigen merupakan katoda, tetapi proses menunjukkan reduksi hidrogen. Troublesome knowledge meliputi proses di anoda dan katoda baterai alkaline, proses discharge dan charge aki, proses di anoda dan katoda bahan bakar, dan ketika baterai alkaline, aki, dan bahan bakar melemah. Threshold concept meliputi proses baterai alkaline, proses charging aki, dan bahan bakar hidrogen saat daya melemah. This study aims to analyze students’ conceptions, troublesome knowledge, and threshold concepts on the topic of batteries using a three-tier diagnostic test (TDM Three-Tier). A phenomenological approach was employed, and the participants were Chemistry Education students from a public university in Bandung. The results showed that for alkaline batteries, correct conceptions include: (1) zinc as the anode undergoes oxidation to produce Zn²⁺, which reacts with OH⁻ to form Zn(OH)₂; (2) manganese dioxide as the cathode undergoes reduction, with electrons flowing from anode to cathode; (3) alkaline batteries cannot be recharged. For lead–acid batteries, correct conceptions involve: (1) lead as the anode forming PbSO₄ deposits; (2) lead dioxide as the cathode forming PbSO₄ with decreased mass; (3) the charging reaction as the reverse of discharging; and (4) electron flow reversing during charging. For hydrogen fuel cells, correct conceptions include: (1) hydrogen as the anode oxidized to form H⁺; (2) oxygen as the cathode forming water; (3) electrons flowing from anode to cathode; (4) the need for continuous fuel supply. Misconceptions identified. in alkaline batteries, they include misidentification of anode/cathode and mass changes, reversed electron flow, and the assumption of rechargeability. In lead–acid batteries, misconceptions involve incorrect electrode positions, misunderstanding mass changes, reversed electron flow during discharging/charging, and the assumption that charging is identical to discharging. For hydrogen fuel cells, misconceptions include incorrect electrode roles, reversed electron flow, false assumptions of rechargeability, and depletion of active materials. Conceptions with unknown reasoning include misunderstandings of redox processes and causes of power depletion. Troublesome knowledge involves electrode processes in alkaline batteries, discharge and charge processes in lead–acid batteries, fuel cell reactions, and weakening of power across battery types. Threshold concepts include processes in alkaline batteries, recharging in lead–acid batteries, and hydrogen fuel cell operation during power depletion.

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Item Type:	Thesis (S2)
Additional Information:	https://scholar.google.com/citations?user=Utctm18AAAAJ&hl=id ID SINTA Dosen Pembimbing: Wiji: 6012036 Tuszie Widhiyanti: 6123602
Uncontrolled Keywords:	baterai, profil model mental, tes diagnostik model mental three-tier threshold concept, troublesome knowledge battery, mental model profile, three-tier mental model diagnostic test, threshold concept, troublesome knowledge
Subjects:	L Education > L Education (General) Q Science > QD Chemistry
Divisions:	Fakultas Pendidikan Matematika dan Ilmu Pengetahuan Alam > Pendidikan Kimia - S2
Depositing User:	Beatrice Ruth Nathania Simanjuntak
Date Deposited:	15 Sep 2025 02:50
Last Modified:	15 Sep 2025 02:50
URI:	http://repository.upi.edu/id/eprint/138689

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