Fill the spaces ASAP..thanks Name _____Mass of crucible cover Mass of crucible +

Question

Fill the spaces ASAP..thanks Name _____Mass of crucible cover Mass of crucible + cover + unknown Mass of unknown Mass of crucible + cover + unknown, after heating Mass of unknown, after beating Mass change of sample upon heating The sample is a carbonate salt a hydrogen carbonate salt (Circle one) Mass of crucible + cover + solid chloride Mass of chloride Q = (mass of final chloride - mass of original unknown)/mass of original unknown = (note this is the experimental value of Q) Theoretical Values of Q: for sodium salt: if the sample was a sodium compound its formula is_____ g of compound will produce _____ grams of NaCl Theoretical Q for sodium compound _____for potassium salt: if the sample was a potassium compound its formula is _____g of compound will produce _____grams of KCl Theoretical Q for potassium compound =_____ Now compare your experimental Q value to the theoretical Q values - which one is the experimental Q closest to? This identifies your unknown. Unknown number: _____ Formula of Unknown:_____

Explanation / Answer

1. Mass of unknown = Mass of crucible+cover+unknown - Mass of crucible+cover

= 24.56 - 23.52 = 1.04grams

2. Mass of unknown after heating = Mass of crucible+cover+unknown after heating - Mass of crucible+cover

= 24.42 - 23.52 = 0.9 grams

3. Mass change of sample upon heating = mass of unknowm before heating - mass of unknown after heating

= 1.04 - 0.9 = 0.5grams

4. Mass of chloride = Mass of crucible+cover+ solide chloride - Mass of crucible+cover

= 24.45 - 23.52 = 0.93grams

Have a nice day!!

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