need help balancing the equation:) Data Preparation w is the chemical equation f

Question

need help balancing the equation:)

Data Preparation w is the chemical equation for the synthesis of lead iodide. Balance t equation and put in the (appropriate phases) for all reactants exist in an aqueous environment. Circle the plete this section in your notebook. hemica de. Balance the chemical product that you are trying to isolate. C an d products as they would Pb(NO3)2( -) +-KI( ) Pb12(-) + 2 KNO3( ) Molecular Weight: Pb(NO3)2 331.22 g/mol KI Pbl2 461.00 g/mol 166.00 g/mol KNO3101.10 g/mol TARGET MASS OF Pbl2 (given by lab instructor) You will be given both reactants in their solid form. Calculate the mass of each reactant that would be required to synthesize exactly this target mass of Pbl2 assuming that the reaction goes to completion. Use the BCA table to help organize your thoughts. Don't forget to convert between grams and moles throughout your calculations! A few lines in the BCA table are included to get you started. +2 KNO 0 mol + 2x mol Pb(NO:) + Ki Pbl Before Reaction 0 mol x mol Change (reaction) 2x mol x mol After Reaction 0 mol 0 mol Stoichiometric Masses of Reactants Required Pb(NO3)2,g KI, g Keep in mind this mass assumes that the reaction has a percent yield of 10 this rarely happens! Use these masses as the minimum to use in order engineer's target

Explanation / Answer

The reaction can be balanced by atom balance method:

Step 1: Lets first Pb atoms: In both sides (reactant side and product side) one Pb atom is there. SO, we dont need to do anything with lead. Just keep it as it is.

Step 2:

Lets now balance Nitrates (NO3-). In both sides (reactant side and product side) two nitrates are there. SO, we dont need to do anything with nitrate as well. Just keep it as it is.

Step 3: Lets now balance K atoms. There are two K in product side but one K is in reactant side. We can balance K if we multiply KI in the reactant side by 2. We eill get an equation like this:

Pb(NO3)2 + 2 KI = PbI2 + 2 KNO3

In doing so, all the atoms are automatically balanced. Now we have to add phases to each component.

Pb(NO3)2 (aq) + 2 KI (aq) = PbI2 (s) + 2 KNO3 (aq)

aq = aqueous

s= solid

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