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Tuesday, September 30, 2014

Eksperimen Untuk Mengenalpasti Asid dan Alkali

Asid dan Alkali 

Asid adalah sebatian kimia yang bersifat masam dan mengkakis. Perkataan "asid" adalah berasal dari perkataan Latin "acidus" yang bererti masam. 
  
 Alkali adalah sebatian kimia yang lebih dikenali sebagai bes atau asas unsur logam bumi beralkali. Perkataan "alkali" adalah berasal dari perkataan Bahasa Arab "al-qaliy" yang merujuk kepada proses pengoksidaan logam akibat pemanasan suhu tinggi.

Sifat Asid dan Alkali 


Sifat-sifat asid

  • Asid mempunyai rasa masam.
  • Asid mengubah kertas litmus biru menjadi merah.
  • Asid mempunyai nilai pH kurang daripada 7.
  • Asid adalah mengakis.

Sifat-sifat alkali
  • Alkali mempunyai rasa pahit.
  • Alkali adalah licin seperti sabun.
  • Alkali mengubah kertas litmus merah menjadi biru.
  • Alkali mempunyai nilai pH lebih daripada 7.
  • Alkali adalah mengakis.
 Ingat semula apa yang pernah saya kongsi tentang tajuk ini pada entri yang lalu... KLIK SINI

Jom eksperimen!!!

Kelas : 5 Arif
Eksperimen : Mengenalpasti Asid, Alkali dan Neutral

 Kertas Litmus




Skala pH











Kesimpulan :

  • Bahan Berasid menukarkan warna Kertas Litmus biru kepada warna merah.
  • Bahan Beralkali menukarkan warna Kertas Litmus Merah kepada warna biru
  • Neutral = Tiada perubahan warna kertas litmus

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