Practical 5 by mervin, ethan, ryan, bohan

Observations:

Observation when carbonate is added to acid: Effervescene(bubbling) occurs

Effect of gas on limewater: Forms a white precipitate

Damp litmus paper: Red litmus-turns blue

Blue litmus-turns red

Conclusion

1) Effervescene occurs and carbon dioxide, water and salt is produced

2) Acid+carbonate-> salt+carbon dioxide+water

3) The salt produced is different

Explanation:

The reactants are different, thus it would produce a difference salt product

4) Bubble gas in to a beaker of limewater and see if a white precipitate forms. If it forms, it is carbon dioxide.

5a) Carbon dioxide is acidic.

Exercise:

2) na2co3+2hcl->2nacl+h2o+co2
3)potassium carbonate+hydrocho ...->potassium chloride+carbon dioxide+water
k2o3+2hcl->2kcl+h20+co2
4) calcium carbonate+nitric acid->calcium nitrate+carbon dioxide+water
2hno3 (aq) +caco3(s)=Ca(no3)2(s)+h2o(l)+co2(g)
5)sodium carbonate+nitric acid->carbonic acid+sodium nitrate
2hno3+na2co3->h2co3+2nano3
6)potassium carbonate+nitricacid->postaassium nitrate+carbon dioxide+water
na2co3+h2so4->na2so4+h20+co2
9)potassiumcarbonate+sulfuric acid->carbonic acid+potassium sulfate
k2co3+2so4->h2co3+k2so4
10)sodium carbonate+ethanoic acid->sodium ethanoate+carbon dioxoide+water
c02h(aq)+na2co3(s)->2ch3co2na(aq)+co2(g)+h20(l)
11)potassium carbonate+ethanoic acid->potassium ethanoate+water
ch3co2h(aq)+koh(aq)->ch3co2k(aq)+h2o(l)