Unit 4 - Inorganic Chemistry and the Periodic Table (9CH0)
Resumen
Summary - Unit 4 - Inorganic Chemistry and the Periodic Table (9CH0)
7 vistas 0 veces vendidas
Grado
Unit 4 - Inorganic Chemistry and the Periodic Table (9CH0)
Institución
PEARSON (PEARSON)
A summary of topic 4, organised so the notes are easy to understand. The notes are on slides, so they can be printed out and used as revision cards or posters, for revision on the go. The notes cross-reference the specification so it is easy to see where each bit of information has come from. They ...
Unit 4 - Inorganic Chemistry and the Periodic Table (9CH0)
Todos documentos para esta materia (18)
Vendedor
Seguir
laurelgracefell
Vista previa del contenido
Group 7 Test for halides (silver nitrate):
Reactivity ↓ down group (↑ shells = ↓ attraction) NaX + AgNO3 →AgX + NaNO3
MPT & BPT ↑ down group (↑ london forces) Ppts: AgCl = white & darkens in light
Electronegativity ↓ down group (↑ shells = ↓ attraction) AgBr = cream & darkens in light
Organic solubility ↑ down group (↑ london forces) AgI = yellow
Water solubility ↓ down group (↓ electronegativity) Ammonia solubility: AgCl = dissolves in conc & dil
Colours: (test for halogens) AgBr = dissolves in conc
Halogen At room temp In aq solution In organic solution AgI = doesn't dissolve
Reducing power:
F Pale yellow gas x x MX + H2SO4 → HX + MHSO4
Cl Pale green gas colourless colourless
- When heated w/ conc H2SO4 halides act as reducing agents (loose
e-, donate e- to another species)
Br Orange/brown liquid orange orange/red - X- loses an e- when it reduces H 2SO4
- Down group = easier to lose an e- due to ↑ radii & ↑ shielding ∴ I-
I Black solid brown pink/violet
ions most reactive
Redox reactions of halogens w/ halides - ∴ I- reduce H2SO4 further
- 2NaBr + Cl2 →2NaCl + Br2 (goes orange in aq & org solvent) Method = add halide + H2SO4 & observe gases leaving the tube.
Cl2 + 2Br- →2Cl- + Br2 Test for HX gases w/ ammonia (explained later)
- 2NaI + Cl2 →2NaCl + I2 (goes brown in aq, pink in org solvent) 1. Cl-
Cl2 + 2I- →2Cl- + I2 H+ + Cl- → HCl (HCl - white misty fumes, white smoke-y fumes w/ ammonia)
- 2NaI + Br2 →2NaBr + I2 (goes brown in aq, pink in org solvent) 2. Br-
Br2 + 2I- →2Br- + I2 H+ + Br- → HBr (HBr - white misty fumes, white smoke-y fumes w/ ammonia)
Disproportionation: H2SO4 + 2H+ + 2Br- → Br2 + SO2 + 2H2O (Br2 = orange fumes,
SO2 = colourless choking fumes)
1. Cl2 + water to kill bacteria
Cl2 (aq) + H2O(l) → HClO(aq) + HCl(aq) 3. I-
0 +1 -1 H+ + I- → HI (HI - white misty fumes, white smoke-y fumes w/ ammonia)
2. Bleach (NaClO) made from Cl2 + cold NaOH H2SO4 + 2H+ + 2I- → I2 + SO2 + 2H2O (I2 = orange fumes,
SO2 = colourless choking fumes)
Cl2 (aq) + 2NaOH(aq) → NaCl(aq) + NaClO(aq) + H 2O(l)
H2SO4 + 6H+ + 6I- → 3I2 + S + 4H2O (S = yellow solid)
0 -1 +1
H2SO4 + 8H+ + 8I- → 4I2 + H2S + 4H2O (H2S = colourless gas, egg smell)
Reactions w/ alkali’s:
Hydrogen halides:
3. Cold, strong alkalis Colourless, soluble gases due to polar H-X
X2 (aq) + 2MOH(aq) → MX(aq) + MXO(aq) + H 2O(l) W/ water, HX(g) + H2O(l) → H3O+(aq) + X-(aq)
0 -1 +1 W/ ammonia, HX(g) + NH3(g) → NH4X(aq) [salt]
4. Hot, strong alkalis HX test (used in reducing power test)
3X2 (aq) + 6MOH(aq) → 5MX(aq) + MXO 3(aq) + 3H2O(l) - Glass rod dipped in ammonia
0 -1 +5 - If it comes into contact w/ HX, white smoke from solid NH4X
Los beneficios de comprar resúmenes en Stuvia estan en línea:
Garantiza la calidad de los comentarios
Compradores de Stuvia evaluaron más de 700.000 resúmenes. Así estas seguro que compras los mejores documentos!
Compra fácil y rápido
Puedes pagar rápidamente y en una vez con iDeal, tarjeta de crédito o con tu crédito de Stuvia. Sin tener que hacerte miembro.
Enfócate en lo más importante
Tus compañeros escriben los resúmenes. Por eso tienes la seguridad que tienes un resumen actual y confiable.
Así llegas a la conclusión rapidamente!
Preguntas frecuentes
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
100% de satisfacción garantizada: ¿Cómo funciona?
Nuestra garantía de satisfacción le asegura que siempre encontrará un documento de estudio a tu medida. Tu rellenas un formulario y nuestro equipo de atención al cliente se encarga del resto.
Who am I buying this summary from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller laurelgracefell. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy this summary for 3,69 €. You're not tied to anything after your purchase.
