Predict the effects of an increase in pressure for each reaction.
N2(g) + 3H2(g) → 2NH3(g)
2503(9) 2802(g) + O2(g)
SnO2(s) + 2H2(g) → Sn(s) + 2H20(g)
Na2CO3(s) + 2HCl(aq) → CO2(g) + H2O(l) +
2NaCl(aq)
s
AgNO3(aq) + Cu(s) → CUNO3(aq) + Ag(s)
DONE

Awhite powder is added to a solution. the images show observations made before the powder is added, just after the powder has been added, and a little while later. (the liquid in the small beaker is phenol red solution.) what evidence shows that a chemical change has taken place?