Question

A 5g sample of an anhydrous grouo 2 metak nitrate loses 3.29g in mass on strong heating. Which metal is present?

Answer 1

what is grouo 2 metak ?

Answer 2

Oops. Imeant group 2 metal.

Answer 3

First, you find the number of moles of NO2 given off (which is the substance being given off, thus causing a reduction in mass) , thus giving you the number of MOLES OF NO3 that were originally in the metal nitrate.

The general formula for a group two metal nitrate would be X(NO3)2. According to this, divide the number of moles you have found for this by two and you'll get the number of moles of the Metal Nitrate. Hence, the number of MOLES OF THE METAL.

By subtracting the mass lost from the original mass, you can obtain the MASS of the metal.

Now, by simply using the formula Moles=Mass/Mr, you can substitute the values you've found previously. to get the Mr of the metal, and by consulting the periodic table, the identity of the metal can be found.

The answer would be Ca. As my Mr was coming to be around 40.

Answer 4

Thnx. Ill try to slove it.

Answer 5

Good luck with that.