LCchemist

All things Leaving Cert Chemistry

[LCchemist @LCchemist]

@TaralyonG @forestavenuedub 😋

[LCchemist @LCchemist]

@colnoc77 Students who get stressed are now in a permanent state of stress and anxiety. No change in those who don’t stress.

[Mark Fearon @fearo]

No sign of our lost Engagement ring. Please RT. Left in a taxi last Saturday after Ireland v Scotland rugby match. €500 reward for finding our ring. We really are devastated. Could it be in the back of a taxi seat? Did someone hand it in somewhere? Thank you all. Mark & Orla.

[LCchemist @LCchemist]

Steam distillation in the extraction of clove oil from cloves -The Principle is two IMMISCIBLE liquids together have a lower b.p. than either of the pure liquids separately #principle #chemistry #organic #LC24

[LCchemist @LCchemist]

The conversions that occur in a catalytic converter are CO to CO2 and NO to N2. Catalysts are platinum, palladium and rhodium. Poisoned by lead. #LeavingCert2023 #chemistry

[LCchemist @LCchemist]

Bond angles
Linear 180 2 bp.
trigonal planar 120 3 bp
tetrahedral 109.5 4 bp
Pyramidal 107 3 bp + 1 lp
V-shaped 104.5 2 bp + 2 lp
bp=bonding pair lp =lone pair #LeavingCert #shapes #LeavingCert2024

[LCchemist @LCchemist]

EXAM PAPER STUFF. Definitions are very important.Generally one per question @ 6 marks…some questions can have more depending on topic)…48 marks out of 400=12% MINIMUM but can be as high as 20% at times depending on year+choice. Get learning properly! Must be perfect👍#LC24

[LCchemist @LCchemist]

Test for carbonate ions/hydrogencarbonate ions. Add MgSO4 solution to solutions of each. Carbonate presents a white precipitate of MgCO3 and Hydrogencarbonate gives no precipitate as Mg(HCO3)2 is soluble in aqueous solution. #anions #LC21 #Chemistry #LeavingCert2024

[LCchemist @LCchemist]

Today’s the day to learn the difference between empirical and molecular formulas! Who knew?? MF shows the actual number and type of atoms present in a molecule. EF is the simplest WHOLE number ratio showing elements in a molecule #LC24 #Chemistry #LeavingCert2024 #formulas

[LCchemist @LCchemist]

Today’s the day to learn the difference between empirical and molecular formulas! Who knew?? MF shows the actual number and type of atoms present in a molecule. EF is the simplest WHOLE number ratio showing elements in a molecule #LC24 #Chemistry #LeavingCert2024 #formulas

[LCchemist @LCchemist]

Brown Ring Test-nitrate ions-add freshly made FeSO4 to the nitrate solution, mix. Carefully+slowly add conc H2SO4 down inside of a slanted test https://t.co/A1ruIYSKbM not mix! See brown ring at junction of two liquids then nitrate ion is present #anions #eutrophication #LC24

[LCchemist @LCchemist]

Test for carbonate ions/hydrogencarbonate ions. Add MgSO4 solution to solutions of each. Carbonate presents a white precipitate of MgCO3 and Hydrogencarbonate gives no precipitate as Mg(HCO3)2 is soluble in aqueous solution. #anions #LC21 #Chemistry #LeavingCert2024

[LCchemist @LCchemist]

EXAM PAPER STUFF. Definitions are very important.Generally one per question @ 6 marks…some questions can have more depending on topic)…48 marks out of 400=12% MINIMUM but can be as high as 20% at times depending on year+choice. Get learning properly! Must be perfect👍#LC24

[LCchemist @LCchemist]

Bond angles
Linear 180 2 bp.
trigonal planar 120 3 bp
tetrahedral 109.5 4 bp
Pyramidal 107 3 bp + 1 lp
V-shaped 104.5 2 bp + 2 lp
bp=bonding pair lp =lone pair #LeavingCert #shapes #LeavingCert2024

[LCchemist @LCchemist]

The conversions that occur in a catalytic converter are CO to CO2 and NO to N2. Catalysts are platinum, palladium and rhodium. Poisoned by lead. #LeavingCert2023 #chemistry

[LCchemist @LCchemist]

Steam distillation in the extraction of clove oil from cloves -The Principle is two IMMISCIBLE liquids together have a lower b.p. than either of the pure liquids separately #principle #chemistry #organic #LC24

[LCchemist @LCchemist]

Today is the day to learn 3 definitions properly!! Le Chatelier’s Principle, chemical equilibrium and dynamic equilibrium. Get to it, they won’t learn themselves!! #LC24 #chemistry

[LCchemist @LCchemist]

@DouglasRob0 @_teachers_pet It’s amazing… you should teach here.

[LCchemist @LCchemist]

My Alma Mater!!!

[St. Mary's, Mallow @stmarysmallow]

The whole #stmarysmallow school community would like to wish our Leaving Certificate & Leaving Certificate Applied class of 2023 every success tomorrow on results day & in their future endeavours.

We look forward to welcoming you back to share in your achievements.💫