The pH of a solution indicates the concentration of free H+ ions in solution on a negative log base 10 scale. Low pH (acidic) means high H+ concentration High pH (basic) means low H+ concentration.
Mistakes. 1  In the manga, Ravenpaw is shown with a slightly altered appearance from his description in the books. 2  He has been mistakenly called Ravepaw. 3  He was mistakenly mentioned with blue eyes.  He is mistakenly called a rogue by Sandstorm in A Clan in 1  Need. He is mistakenly called 'Ravenclaw' by Vicky.
The first visible difference between a crow and a raven is the size. Ravens are usually bigger in size than the crows. When a raven can be up to 64 cm in height, a crowâs height ranges up to 46 cm. Similarly, the wings, feet, and beak sizes also differ. Being bigger in size, the ravens are very much heavier than the crows. The age spans of ravens are more than that of crows.