P. CrCl (a) (b) 2 The following substances are either reactants or products, and

Question

P. CrCl (a) (b) 2 The following substances are either reactants or products, and are written in the Write the corresponding net ionic equations for the aqueous solution, in the correct direction (products on the right). If no clear direction can be predicted please indicate. Hint: "switch partners" of the given substances and examine all four substances. Which of these wil be a gas, an insoluble solid, or a weak acid? Once you identify component ions that yield that substance. molecular form. Example: Phs + NaNO, The ions involved are Pb2', s, Nat, and NO. We know from the solubility trend chart that all sulfides except Na", Kt and NH4' are insoluble, so that leaves PbS as a product. If we switch the ion partners we get the starting substances PdN0b and Na,s·The net ionic equation is Pb2+ + S2- PbS a HNO + Ba(OH) a. 82

Explanation / Answer

HNO3 + Ba(OH)2

HNO3 is an acid

Ba(OH)2 is a base

Acid reacts with base and forms water --> Universal facts

2HNO3(aq) + Ba(OH)2 (aq) -----> Ba(NO3)2 (aq) + 2H2O (l)

Ionic equation :

2 H+ (aq) + 2 NO3- (aq) + Ba(2+) (aq) + 2 OH- (aq) --> Ba(2+) (aq) + 2 NO3- (aq) + 2 H2O (l)

Net ionic equation :

Cancel same ions on each side

2 H+ (aq) + 2 OH- (aq) --> 2 H2O (l)

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