When an acidic substance is tested, only blue litmus paper changes colour to red.

Most acidic substances taste sour and have a burning sensation when touched.

For example, grapes, tomato sauce, lemon juice, and lime juice.

When an alkaline substance is tested, only red litmus paper changes to blue.

Most alkaline substances taste bitter and feel slippery when touched.

For example, cabbage, bicarbonate soda water, white eggs, toothpaste, and soap.

When a neutral substance is tested, there is no change in colour for both types of litmus paper.

Neutral substances have different taste such as tasteless, sweet and salty.

Neutral substances may feel slippery or coarse when touched.

For example, drinking water, sugar water, fresh milk, saltwater, honey and cooking oil.

Substance

Change in colour of blue litmus paper

Change in colour of red litmus paper

Blue \(\rightarrow\) Red

No changes

No changes

Red \(\rightarrow\) Blue

No changes

No changes

Semasa bahan berasid diuji, hanya kertas litmus biru yang berubah warna menjadi merah.

Kebanyakan bahan berasid terasa masam dan mempunyai rasa terbakar ketika disentuh.

Contohnya, buah anggur, sos tomato, limau nipis, dan asam jawa.

Apabila bahan beralkali diuji, hanya kertas litmus merah yang berubah menjadi biru.

Kebanyakan bahan alkali terasa pahit dan terasa licin ketika disentuh.

Contohnya, kobis, air soda bikarbonat, telur putih, ubat gigi, dan air sabun.

Apabila bahan neutral diuji, tidak ada perubahan warna untuk kedua-dua jenis kertas litmus.

Bahan-bahan neutral mempunyai rasa yang berbeza seperti tawar, manis dan masin.

Bahan-bahan neutral mungkin terasa licin atau kasar ketika disentuh

Contohnya, air minuman, air gula, susu segar, air garam, air madu dan minyak masak.

Perubahan warna kertas litmus biru

Perubahan warna kertas litmus merah

Biru \(\rightarrow\) Merah

Tiada perubahan

Tiada perubahan

Merah \(\rightarrow\) Biru

Tiada perubahan

Tiada perubahan

When an acidic substance is tested, only blue litmus paper changes colour to red.

Most acidic substances taste sour and have a burning sensation when touched.

For example, grapes, tomato sauce, lemon juice, and lime juice.

When an alkaline substance is tested, only red litmus paper changes to blue.

Most alkaline substances taste bitter and feel slippery when touched.

For example, cabbage, bicarbonate soda water, white eggs, toothpaste, and soap.

When a neutral substance is tested, there is no change in colour for both types of litmus paper.

Neutral substances have different taste such as tasteless, sweet and salty.

Neutral substances may feel slippery or coarse when touched.

For example, drinking water, sugar water, fresh milk, saltwater, honey and cooking oil.

Substance

Change in colour of blue litmus paper

Change in colour of red litmus paper

Blue \(\rightarrow\) Red

No changes

No changes

Red \(\rightarrow\) Blue

No changes

No changes