ACID, BASES, SALT WORKSHEET

Subject: Science -Chemistry Chapter: 02 – Acids , Bases and Salts

1. Salt is a product of _______________________reaction between an acid and base.
2. Salts are formed from the ________________of the base and anion of the ______________
3. Complete the table:
        neutral salt                                                            strong base               pH=

                                       
                                                  strong acid                                                  pH= less than 7


       basic salt                                                            strong base                  pH=


4.Complete the following chemical reactions

a. 2NaCl(aq)+2H2O →
b.  NaCl + H2O+CO2+NH3 →
c.  2NaHCO3 →

5. Chlorine produced during _________________________of brine is passed through dry
slaked lime and ________________________ is produced.
Two uses of bleaching powder are:
___________________________________________________

6. NaCl + H2O+CO2+NH3 NH4Cl+ NaHCO3

Above reaction is for the preparation of ____________________ and the process is called
____________________________

7. Rearrange the sequence for the preparation of washing soda.
a. Carbon dioxide is introduced from the base of the tower which reacts with ammonia and water
to form ammonium bicarbonate
b. Cold and concentrated solution of ammonia is saturated with brine



c. Ammonium bicarbonate reacts with sodium chloride to form sodium hydrogen carbonate and ammonium chloride.

d. The ammoniacal brine is fed from the top of the carbonating tower packed with perforated plates.

e. Sodium hydrogen carbonate is heated to form sodium carbonate.

f. Sodium carbonate is recrystalized by dissolving in water to get washing soda.

g. sodium hydrogen carbonate is sparingly soluble in water and can be separated by
filtration.

8. Washing soda is used in __________________ and _________________industry .It is also used in manufacture of ___________________.

9. Chemical formula of Plaster of Paris is ______________________.

10. ___________________ sulphate also called blue vitriol is a _____________________ salt.
It is a hydrated salt meaning that it __________________________________________________
.
11.Water of crystallisation is defined as the fixed ____________________________________________________________________________________

12. When we heat copper sulphate salt we see _____________ molecules coming out
and the salt becomes ___________________ in colour. On adding water
the white ___________________ salt becomes ______________ again.