Reactions With Dilute Hydrochloric Acid

[A13235378]

Homework Statement

In one of the exercises on inorganic reactions in my test, it consisted of marking the alternative in which a solid substance at 25 degrees Celsius reacted with diluted HCl and formed a gas denser than atmospheric air.

Relevant Equations

HCl + NaBr = NaCl + HBr

One of the alternatives was NaBr

My resolution was as follows:

NaBr + HCl forms NaCl and HBr

I researched and saw that HBr would be a gas and would be denser than air because its molar mass is greater.

However, the answer was not that.

My error is in which step?

In the reaction? What would be correct?

Furthermore, the other alternative presents the substance Pb(NO3)2

Reaction with HCl would form PbCl2 and HNO3, not forming gas.

Is my thinking correct?

I can't find reliable sources with these reactions made.

Thanks for the help.

 

[Borek]

Problem is with the reaction and the _diluted_ acid.

 

[A13235378]

Problem is with the reaction and the _diluted_ acid.

And how would the reaction be with the diluted acid?

 

[Borek]

There would be none.

Some quantities of HBr can be probably produced with concentrated HCl, but even that is not listed as a viable way of lab synthesis. It will be probably way too contaminated with just HCl.