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# alkaline

«alkaline» in Mova's school dictionary: **the opposite of an acid: it has a pH above 7, such as…** — its meaning for a pupil, its sense in the lessons and examples, with 4 sentences of Mova's corpora that use it.

### part of speech

adjective (alkaline)

### meaning for a pupil

1) Alkaline describes a substance that is the opposite of an acid: it has a pH above 7, such as soap, baking soda or bleach. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/A/alkaline/#m1)

2) An alkaline battery is a common kind of battery that uses an alkaline chemical inside. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/A/alkaline/#m2)

### sense in the lessons

In science lessons, the pH scale goes from 0 to 14: acids are below 7, neutral is 7 (pure water), and alkaline is above 7. Indicators such as red cabbage juice or litmus change colour: alkalis turn red litmus blue. Strong alkalis like bleach and oven cleaner can burn skin, so safety goggles and gloves are needed. Some soils are alkaline, which matters to gardeners.

### examples

- Soap is slightly alkaline. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/A/alkaline/#x1)
- Red litmus paper turns blue in an alkaline solution. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/A/alkaline/#x2)
- Baking soda makes the water alkaline. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/A/alkaline/#x3)
- Bleach is strongly alkaline, so handle it with care. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/A/alkaline/#x4)
- The TV remote uses alkaline batteries. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/A/alkaline/#x5)
- Some plants grow best in alkaline soil. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/A/alkaline/#x6)
- Our cabbage indicator turned green in the alkaline liquid. [tree →](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/A/alkaline/#x7)

### note

Adjective only. The noun is alkali (plural alkalis). Opposite: acidic. A substance that is neither is neutral. Trap: alkaline does not mean safe; strong alkalis are as dangerous as strong acids. Myth: alkaline water does not change the pH of your blood.

### In the corpora

- [Bacteria on teeth make acid from sugar, which damages enamel; toothpaste is slightly alkaline, and fluoride in it makes enamel tougher.](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/16-alkalis-and-soda/11/)
- [Soap is slightly alkaline and feels slippery; strong alkalis like oven cleaner can burn skin badly.](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/16-alkalis-and-soda/12/)
- [An indicator is a substance whose colour shows whether something is acidic or alkaline.](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/17-indicators-the-red-cabbage-rainbow/8/)
- [Hydrangeas turn blue in acidic soil and stay pink in alkaline soil.](https://md.mova.elamur.ai/free/en/corpora/school/chemistry/37-olympiad-everyday-chemistry-detectives/15/)

### Trees and pragmatics

[Every meaning and example of «alkaline» parsed by Mova](https://md.mova.elamur.ai/free/en/corpora/dictionaries/school/A/alkaline/), each sentence with its dependency tree and frames.