Neutral litmus paper, acid-base testing

AgN03(c9) + HiO(/). 4.113 (a) Check with litmus paper, test reactivity with carbonate, or mix with NaOH(c ) and demonstrate neutralization (use an acid-base indicator), (b) Titrate a known quantity of acid with standard NaOH( ) solution, (c) Visually compare the conductivity of an acid solution with that of a sodium chloride solution of the same molarity. 4.115 (a) The complete reaction is Pb (c9) + 2NO3 (09) -1- Na2S04( )... 

Red and blue litmus paper is used for testing alkaline and acid solutions. For instance, if we had a solu-tion and wished to know whether it was a base or acid, we would take a piece of red or blue litmus paper and dip it in it. If the red paper turned blue it would indicate a base. If it remained red we would not know whether or not it was neutral or alkaline. Therefore, we would try it with blue litmus paper. If the blue litmus paper would turn red we would then under-... 

Directions a) Determine by testing with litmus paper whether solutions of the following salts show a neutral, acidic, or basic reaction sodium chloride, potassium nitrate, sodium sulphate, calcium chloiide, sodium sulphide, copper sulphate, ferric chloride, sodium carbonate, and sodium acetate. (1) Tabulate the results and state in the case of each salt the strength (weak or strong) of the acid and the base from which the salt is derived. 

Litmus is a substance that is extracted from a type of lichen and absorbed into porous paper. There cire three different types of litmus — red, blue, and neutral. Red litmus is used to test for bases, blue litmus is used to test for acids, and neutral litmus can be used to test for both. Here s how the paper reacts to acids and bases ... 

---