Pemanfaatan Potensi Lokal Jombang Berupa Bunga Pacar Air Sebagai Indikator Alami

Abstract

Acid base properties can be easily observed based on the difference in color when using indicators. The use of indicators is very rare at the secondary school. Natural indicator are needed to support acid-base learning at the secondary school. This study aims to determine the effectiveness of local potency extract of jombang in the form of henna flowers as a natural indicator and the effectiveness of HVS paper and filter paper as indicator paper. Natural indicator paper was obtained by immersing HVS paper and filter paper in the extract of red and purple henna flowers using water solvent. The test result in acid and base solution showed that the red and purple henna flower extract had the same effectiveness as a natural indicator, as well the red and purple henna flower extract indicator paper made from HVS paper and filter paper.

Pengembangan Instrumen Tes Penguasaan Konsep Representasi Kimia Pada Lima Indikator Asam Basa Dari Alam : Analisis Dengan Rasch Model

“…Beberapa penelitian terdahulu telah membahas banyaknya bahan alam yang berpotensi digunakan sebagai indikator alami asam basa diantaranya pembuatan indikator alami pada buah lakum (Apriani et al, 2016), bunga telang (Ramdan et al, 2017), mahkota bunga ketepeng cina (Khairunnisa et al, 2017), pucuk daun pucuk merah (Sukemi et al, 2018), umbi buah bit (Adhni & Asngad, 2018), bawang merah (Virliantari et al, 2018), daun jati muda (Wibowo & Rahayu, 2017), kembang sepatu (Riniati et al, 2019), bunga pacar air (Wijayadi et al, 2020), kulit manggis (Kurniawati, 2020), kulit kopi (Wati & Hasby, 2021). Maka peneliti melakukan riset pendahuluan guna menentukan indikator alami apa saja yang akan dimuat pada instrumen yang akan dikembangkan.…”