active recalls

aiming for grade 9

Siempre he soñado con

I have always dreamed of

Es buena/ malo/ perjudical para la salud

Its good/ bad/ dangerous for the health

Para decir la verdad

to say the truth

Siempre me ha gustado

I have always liked

Que yo sepa

As far as I know

Si tuviera la opción

If I had the option

Si fuera posible

If it were possible

Me pone de los nervios

He/ she gets on my nerves

trabajo como un burro

i work my socks off

sin una sombra de duda

without a shadow of a doubt

mis padres dicen que

my parents say that

Add to test for halide ions

Nitric acid then silver nitrate

Bromine (br-) Ions present

cream precipitate

Chlorine (cl-) ions present

White (milk) precipitate

Iodine (I-) ions present

yellow (butter) precipitate

Testing for sulfate (SO4²-) ions

Barium chloride white precipitate

Testing for carbonate ions

Add HCl and bubble gas through limewater

Testing for colour ions

Sodium Hydroxide (NaOH) solution

Copper2+ and NaOH

Blue precipitate formed

phosphate rock + nitric acid

calcium nitrate and phosphoric acid precipitates (soluble)

phosphate rock + sulfuric acid

Single superphosphate (soluble)

Phosphate rock + phosphoric acid

triple Superphosphate (soluble)

single superphosphate is a mix of

calcium phosphate and calcium sulfate

triple superphosphate is

calcium phosphate

bronze alloy

copper and tin

brass alloy

copper and zinc

steel alloy

iron and carbon

stainless steel

steel and chromium/ nickel

testing for proteins

biuret reagent blue to lilac

testing for starch

iodine solution orange to black

testing for sugars

benedicts reagent and heat, blue to red

overall hydrogen fuel cell equation

O2 + 2H2 —> 2H2O

me hubiera gustado visitar otros países con mi insti pero no es una problema

i would have liked to visit other countries with my school but it is not a problem