part B.

would you expect the emissions to vary if metal flourides were used rather than metal chlorides?

Not really. In flame emissions, it's the metal that is excited, not Cl or F ions.

No, because it's the valence electrons on the metals that take/release energy in the form of visible emissions, not the chloride or fluoride ions.

Yes, you would expect the emissions to vary if metal fluorides were used instead of metal chlorides. This is because different metal compounds have different chemical properties and react differently when subjected to various conditions, including high temperatures.

Metal chlorides (such as aluminum chloride and zinc chloride) are known to release chlorine gas when heated. Chlorine gas can form toxic compounds when combined with other substances, leading to the emission of harmful gases.

On the other hand, metal fluorides (such as aluminum fluoride and zinc fluoride) generally do not release fluorine gas or form toxic compounds at high temperatures. Fluorine tends to form strong bonds with the metal atoms, resulting in less volatile emissions compared to metal chlorides.

However, it's important to note that the specific emissions and their quantities would also depend on various factors, including the specific metal compound, the reaction conditions, and the combustion or heating process being used.

To determine whether emissions would vary if metal fluorides were used instead of metal chlorides, we need to consider some factors.

1. Chemical Properties: Metal fluorides and metal chlorides have different chemical properties. Fluorides are generally more reactive and have a higher affinity for binding with other elements. Chlorides, on the other hand, are less reactive and have different bonding characteristics. These differences can affect the combustion process and the formation of emissions.

2. Combustion Reaction: Depending on the specific fuel and conditions, the combustion reactions will differ when metal fluorides or metal chlorides are used. Combustion reactions involve the fuel reacting with oxygen, and any metal compounds present will also react. These reactions can release different byproducts and emissions.

3. Emission Control Systems: The choice of metal compound can impact the effectiveness of emission control systems. For example, some emission control technologies are designed to selectively capture certain compounds, while others may be more efficient at capturing different compounds. The choice of metal compound can influence the pollutant capture efficiency.

Given these considerations, it is reasonable to expect that emissions would vary if metal fluorides were used instead of metal chlorides. However, the exact nature and magnitude of the variation will depend on various factors including the specific metal compounds, fuel, combustion conditions, and the emission control systems in place.

To obtain more precise information about how emissions would vary, one would need to conduct detailed research or consult scientific studies that investigate the specific metal compounds, combustion processes, and emission control techniques.