Ex 6

‫بسم ال الرحمن الرحيم‬ Name: ayedzahran Group: Day:

Experiment 6 "Identification of seven solutions" _________________________________________________________________ I. Complete table 1 before coming to lab Table 1 Na2CO3

CaCl2 N.R.

Na2CO3 CaCl2 Ba(NO3)2 AgNO3 HCl HNO3 NaOH Not: Precip means Precipitate

Ba(NO3)2 Precip N.R.

AgNO3 Precip Precip N.R.

HCl Gas N.R. N.R. Precip

HNO3 Gas .N.R .N.R .N.R .N.R

NaOH .N.R .N.R Precip Precip Heat Heat

5 Precip .N.R .N.R .N.R

6 .N.R .N.R .N.R Precip N.R.

7 N.R. Gas Gas Precip Precip N.R.

II. Observations and results: 1. Write your experimental observations in table 2

Table 2 1

2 Heat

1 2 3 4 5 6 7 Not: Precip means Precipitate

3 Heat N.R.

4 Precip N.R. Precip

2. Using your observations identify the seven solution and fill the table:

Code 1 2 3 4 5 6 7

Formula and name NaOH HNO3 HCl AgNO3 Ba(NO3)2 CaCl2 Na2CO3

III. Answer the following questions: 1. Write net ionic equations for all reactions (precipitate formation, gas evolution and temperature change) you have listed in table 1 a. CO32- + Ba2+ BaCO3(s) 21+ b. CO3 + 2Ag Ag2CO3(s) 21+ c. CO3 + 2H H2O + CO2(g) 21+ d. CO3 + 2H H2O + CO2(g) 11+ e. 2Cl + 2Ag 2AgCl(s) 2+ 1f. Ba + 2OH Ba(OH)2(s) 11+ g. Cl + Ag AgCl(s) 1+ 1h. Ag + OH AgOH(s) i. NaOH + HCl H2O(l) + NaCl(aq) + Heat ΔT > 0 j. NaOH + HNO3 H2O(l) + NaNO3(aq) + Heat ΔT > 0 2. Determine metathesis reactions. Give examples Metathesis reactions: reactions in which a precipitate (solid substance) is formed and gases are formed The solutions, are observed in addition to those where electrolyte is formed Ex: Ba(NO3)2 + Na2CO3 2NaNO3(aq) + BaCO3(s) Na2CO3 + 2HCl 2NaCl(aq) + H2O(l) + CO2(g) Not: For experiment number , For calculation number , For the solution of answers .