posted by denessta .
what is a ph scale? what is a acid? what is alkalis? what acid and alkais can you find around the house? (put pictures to go with this). when u are giving an explanation of what ph scale, acid and alkalis mean plz be as clear as possibe, use understandable low and simple language. also write a very very long thing answering my questions. by the way i am in year 7.