ph

«ph» in Mova's school dictionary: a number that shows how acidic or alkaline a liquid is… — its meaning for a pupil, its sense in the lessons and examples, with 3 sentences of Mova's corpora that use it.

part of speech

noun (pH); letters (ph)

meaning for a pupil

1) pH is a number that shows how acidic or alkaline a liquid is, on a scale from 0 to 14. tree →

2) The letters «ph» together usually make an /f/ sound, as in phone and elephant. tree →

sense in the lessons

In science, pH 7 is neutral (pure water), below 7 is acid (lemon juice), above 7 is alkali (soap). Litmus paper or universal indicator changes colour to show pH. In phonics, «ph» is one way to spell the /f/ sound, mostly in words from Greek.

examples

• Lemon juice has a low pH because it is acidic. tree →
• Pure water has a pH of 7. tree →
• The indicator turned purple, so the pH was high. tree →
• «Ph» in «photo» sounds like f. tree →
• We tested the pH of the pond water. tree →
• Soap has a pH above 7. tree →

note

Write it pH (small p, capital H). A LOWER pH number means MORE acidic. Each step is ten times stronger: pH 3 is ten times more acidic than pH 4.

In the corpora

• Universal indicator mixes several dyes, so each pH gets its own colour, a whole rainbow from red to purple.
• The colour substance in red cabbage changes shape at different pH, and each shape has a different colour.
• Scientists also use electronic pH meters.

Trees and pragmatics

Every meaning and example of «ph» parsed by Mova, each sentence with its dependency tree and frames.