Question

please help with these questions thank you !

In your experiment you were excpected to observe patterns of reactivity 1) The metal that reacted the most aggressively with water was (Ca, K, Na or Mg). Na The FORMULA for the gas produced when that metal reacted with water was The remaining solution was bsi (neutral, acidic, basic). 0.5 As stated in the lab manual, using your observations you could organize those four metals in order of reactivity. That order should have been: <g Na CA least reactive most reactive 2) The two questions from your prelab Which element is expected to lose its electrons more easily to form a positive ion: Mg, Al, Si or S? What is the abbreviated electronic configuration of P? [Ne] 35 30 3) From the demonstrations, complete the reactions making sure they are balanced 02 Ss (Compound A) Н.О Compound A 4) From the lab questions 0 S aadiu (acidic, basic, neutral) Going across a period from left to right, the oxides of the elements get more when ignited. Strike anywhere matches, composed of P4S3, produce and 5) Experimental procedure How was Ca converted to CaO? a) added it to water What was the color of the I2 crystals? a) light blue to biue b) heated it with a Bunsen burner reacted it with CO2 b) yellowish green c) orange d) purple to black

Answer 1

Answer 1):- The metal that reacted the most aggressively with water was " K (Potassium)".

The balanced chemical reaction of potassium (K) with water:

K (s) + H₂O (l) $\rightarrow$ KOH (aq) + H₂ (g)

The formula for the gas produced when that metal reacted with water was H₂ (hydrogen).

The remaining solution was basic (because of KOH).

The order of reactivity is:

Mg (least reactive) < Ca < Na < K ( most reactive)

----------------

Answer 2):- Al (Aluminium) loses its electrons more easily.

Explaination:- Generally the ionisation energy increases, as we move left to right in periodic table. But first ionization energy of group 2 elements is more than group 13 and also ionisation energy of group 15 elements is more than group 16 elements.

Electronic configuration of P : [Ne] 3s² 3p³ .

----------------

Answer 3):- S​​​​​​​₈ + O₂ $\rightarrow$ SO₂

SO₂ + H₂O $\rightarrow$ H₂SO₃

_{----------------}

Answer 4):- Going across a period from left to right , the oxides of the elements get more acidic.

P​​​​​​​​​​​​​​_{4​​​​​​​}S​​​​​​​₃ + 8 O₂ $\rightarrow$ P₄O₁₀ + 3 SO​​​​​​₂

_{-----------------}

Answer 5):- Ca is converted by CaO: b) by heating it with a Bunsen burner.

The colour if I₂ crystals was: d) purple to black

------------