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Year 9 - Science > Reactions with acid - Chemical Changes > Flashcards

Reactions with acid - Chemical Changes Flashcards

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1
Q

What is the atomic radius?

A

Distance between the centre of the atom to the outermost electron

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2
Q

What is the equation when a metal reacts with an acid?

A

metal + hydrochloric acid → metal salt + hydrogen

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3
Q

What acid is used during the practical?

A

Hydrochloric acid

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4
Q

What are the products of magnesium and hydrochloric acid?

A

Magnesium chloride + hydrogen

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5
Q

What happens to magnesium when it reacts with hydrochloric acid?

A
  • Fizzing
  • Dissolves quickly
  • Hydrogen present
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6
Q

What does it mean when you light a splint and put it inside a test tube with a metal and HCl and it pops?

A

It means hydrogen gas is present

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7
Q

What happens to zinc when it reacts with hydrochloric acid?

A
  • Very little fizzing
  • Hydrogen present
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8
Q

What happens to iron when it reacts with hydrochloric acid?

A
  • Slow fizzing
  • Hydrogen present
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9
Q

What happens to copper when it reacts with hydrochloric acid?

A
  • No reaction
  • No Hydrogen present
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10
Q

How can you know how reactive a metal is (in water)?

A

One that produces the most bubbles is the most reactive

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11
Q

What is produced when a metal reacts with water?

A

Metal + water → Metal hydroxide + hydrogen

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12
Q

What does it mean when the universal indicator (water reactions) turn purple?

A

The solution is alkaline

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13
Q

How does lithium react with water?

A
  • Bubbling
  • Slowly dissolves
  • Purple with UI
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14
Q

How does sodium react with water?

A
  • Fizzing
  • Moves quickly around surface
  • Purple with UI
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15
Q

How does potassium react with water?

A
  • Flames/ catches fire
  • Vigorous fizzing
  • Moves quickly
  • Purple with UI
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16
Q

How does calcium react with water?

A
  • gentle fizzing
  • Slowly dissolves
  • Purple with UI
17
Q

What 3 metals were tested but didn’t react with water?

A
  • Zinc
  • Iron
  • Copper
18
Q

What can you react magnesium, zinc, iron and copper with since they are less reactive than potassium, sodium and lithium?

A

Dilute acid

19
Q

What happens when metal reacts? How is its reactivity affected?

A

Lose electrons to form a positive ion, reactivity depends on its ability to lose an electron to form a positive ion

Year 9 - Science (54 decks)

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