query: يتسمى رقم الأس الهيدروجيني للمادة الكيميائية، وتنجّم تصنع مؤشر للرقم هذا بعصير الكرنب الأحمر.
positive: This is called a chemical's pH. You can make an indicator using red cabbage juice.
negative: This is called a chemical's pH. You will make an indicator using red cabbage juice. This is not called a chemical's pH. You can make an indicator using red cabbage juice.