Chemistry: Post your doubts here!

[FahimJustFahim]

View attachment 64351 Can anyone solve this, please?

its B

View attachment 64351 Can anyone solve this, please?

Its B

 

[tahmed.troy]

X is the oxide of a Period 3 element. X reacts with water to give an acidic solution. A solution is prepared by reacting 0.100g of X with excess water. This solution was neutralised by exactly 25.0 cm of 0.100 mol dm sodium hydroxide solution.
what could be the identity of X?
Al2O3
MgO
P4O10
SO3

 

[ptet.chemistry]

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[Zenchin92]

Hi can someone help me with this question ?

 

[ptet.chemistry]

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[Scoobydoo435]

hi i wanted to ask something relating to electronegativity. In the syllabus it says understand, in simple terms, the concept of electronegativity and apply it to explain the properties of molecules such as bond polarity (see also Section 3.3(c)), the dipole moments of molecules (3.3(d)) and the behaviour of oxides with water. How can i apply the concept to the behaviour of oxides?

More electronegative the central metal atom, more acidic the oxide

 

[blootoomatoo]

P×7000×10*-6=0.96/32×8.31×303


Ans:10.8 kPa

So it's C

Why do you multiply 7000 by 10*-6?

 

[Tasneem Ayham]

Hello Everyone!
Can anyone help me with this? How is it B? How do I solve such equations?

 

[MUGABE King]

OK so first you need to know the reactions of the period 3 oxides with water. AL2O3 does not react so optionA b are wrong. Next we react 2NaOH (which is a basic oxide and the product of reaction between oxide and H2O) with corresponding acidic oxide & balance the equations.
NOTE The Q states"neutralised by exactly 1mol....so D is correct as it balances perfectly with 2NaOH.

thank you