Fill in the Blanks EDUC 3309: Exploring Acids and BasesOnline version Review your knowledge of acids and bases by filling in the blanks.! by kg gentsch 1 seven sour baking base bitter soda acid pH red citric blue litmus scale The strength of an acid or base is measured on the . A neutral solution has a pH of . A safe indicator of pH is paper . The H is pH stands for hydrogen . Acids usually have a taste . The acids in lemons and oranges are called acid . Acids turn litmus paper . Bases usually have a taste . Bases turn litmus paper . A common base is . A substance with a pH between 0 - 7 is a / an . Bleach is a .