Educational worksheet on acids and bases for chemistry students.

Let’s go through each part of the worksheet step by step.

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Part 1: Basic information about Acids and Bases

We need to classify each item as an acid or a base. Let’s think about what we know:

- Acids often taste sour, can be corrosive, turn blue litmus paper red, and react with metals to give off hydrogen gas.
- Bases often feel slippery, taste bitter (but don’t taste them!), turn red litmus paper blue, and are used in soaps and cleaners.

Now let’s classify:

1. Taste bitter → This is a property of bases.
✔ Base

2. Taste sour → This is a property of acids (like lemon juice).
✔ Acid

3. Feels slimy or slippery → That’s how bases feel (like soap).
✔ Base

4. Turns litmus paper blue → Bases turn red litmus paper blue.
✔ Base

5. Turns litmus paper red → Acids turn blue litmus paper red.
✔ Acid

6. Gives off hydrogen gas when it reacts with some metals → Acids do this (like vinegar + zinc = bubbles of H₂).
✔ Acid

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Part 2: Acid and Bases in everyday use

We’ll fill in the blanks using the paragraph and our knowledge.

> “What most people think of chemistry, the first term that come to mind are acids and bases. The chemicals that produce these ions are called ________. Chemicals that produce hydroxide ions (OH⁻) in water are known as ________.”

From science class:
- Substances that produce H⁺ ions are acids.
- Substances that produce OH⁻ ions are bases.

So:
→ First blank: acids
→ Second blank: bases

> “One of the most common acids is acetic acid — its chemical formula is CH₃COOH. Another product called lactic acid is better for us. It also provides us with energy during exercise. Its chemical name is ________, and its chemical formula is C₃H₆O₃.”

Wait — the text says “Another product called lactic acid...” so the chemical name is just lactic acid. But maybe they want the IUPAC name? Actually, no — the sentence says “its chemical name is ___”, and since it already said “called lactic acid”, we can write:

→ lactic acid

But wait — looking again: “Its chemical name is ________, and its chemical formula is C₃H₆O₃.” Since it’s introducing lactic acid, and giving the formula, the blank should be lactic acid.

Actually, rereading: “Another product called lactic acid is better for us. It also provides us with energy during exercise. Its chemical name is ________, and its chemical formula is C₃H₆O₃.”

This seems redundant — but perhaps they mean the systematic name? Lactic acid’s IUPAC name is 2-hydroxypropanoic acid, but that’s too advanced. Given the level, they probably just want lactic acid again. But that doesn’t make sense. Wait — maybe it’s a trick? No — let’s look at context.

Actually, the sentence structure suggests they’re telling you the common name (“called lactic acid”) and then asking for the chemical name — which might still be “lactic acid” because that’s its accepted chemical name. Or perhaps they expect you to leave it blank? No — let’s check standard curriculum.

In middle school, they usually accept “lactic acid” as the chemical name. So:

→ lactic acid

But wait — later it says: “An example of a food containing this acid is ________.” Common foods with lactic acid: yogurt, sour milk, pickles.

→ yogurt (or sour cream, etc.)

Next:

> “Another product that is used all the time is Drano. Drano is a (acid/base) ________, and its chemical name is sodium hydroxide. Its chemical formula is NaOH. A chemical is more dangerous than the ones used for cleaning drains. It is called sulfuric acid. Its chemical formula is H₂SO₄. These two compounds are very strong and have a (chemical) name: ________.”

Drano contains sodium hydroxide → that’s a base.

So:
→ Drano is a base

Then: “These two compounds are very strong and have a (chemical) name: ________.”

Strong acids and strong bases are called strong electrolytes? Or maybe just “strong acids and bases”? But the blank says “a (chemical) name” — singular.

Actually, in context, they’re talking about sulfuric acid and sodium hydroxide — both are strong — so maybe the answer is strong? But that’s not a name.

Wait — perhaps they mean “corrosive”? But that’s not a chemical name.

Looking back: “have a (chemical) name: ________.” Maybe they mean the category? Like “strong acid” and “strong base” — but it’s one blank.

Perhaps it’s a mistake? Or maybe they want “electrolyte”? Not quite.

Another thought: sometimes they’re called “caustic” — especially sodium hydroxide is caustic soda.

But sulfuric acid isn’t typically called caustic.

Wait — the sentence says: “These two compounds are very strong and have a (chemical) name: ________.”

I think they might be expecting strong — but that’s not a name.

Alternatively, perhaps “mineral acid” for sulfuric, but sodium hydroxide isn’t mineral.

Let me skip and come back.

Next:

> “Vinegar is an (acid/base) ________ that has a chemical name: ________. Vinegar is used in cooking and cleaning. Its chemical formula for this substance is ________.”

Vinegar contains acetic acid → so it’s an acid.

Chemical name: acetic acid

Formula: CH₃COOH (as given earlier)

So:
→ Vinegar is an acid
→ Chemical name: acetic acid
→ Formula: CH₃COOH

Back to the Drano/sulfuric acid part:

“Drano is a (acid/base) ________” → base

“These two compounds are very strong and have a (chemical) name: ________.”

Perhaps they mean “strong” — but let’s see if there’s a better fit.

In some contexts, they’re called “corrosive substances” — but again, not a chemical name.

Wait — maybe the blank is for “strong acid and strong base” — but it’s one blank.

Perhaps it’s a typo, and they mean “property” instead of “name”.

Given the level, I think they might expect strong — but let’s look for clues.

Earlier it says: “A chemical is more dangerous than the ones used for cleaning drains. It is called sulfuric acid.” — so comparing Drano (NaOH) and sulfuric acid (H₂SO₄).

Both are strong — so perhaps the answer is strong.

But the phrase is “have a (chemical) name” — which is odd.

Another idea: in some curricula, they’re called “ionic compounds” — but not specific.

Perhaps “electrolytes” — but weak acids are also electrolytes.

I think the safest bet is to put strong — meaning strong acid and strong base.

Or maybe “caustic” — but sulfuric acid isn’t caustic; caustic refers to bases.

Upon second thought, sodium hydroxide is commonly called “caustic soda”, and sulfuric acid is “oil of vitriol”, but that’s historical.

For a student worksheet, they probably expect:

→ Drano is a base

→ The chemical name for the pair: perhaps strong — but let’s see the next part.

Actually, re-reading: “These two compounds are very strong and have a (chemical) name: ________.”

I recall that in some texts, they’re referred to as “strong electrolytes”, but again, not precise.

Perhaps the blank is for “acid and base” — but that’s not a name.

Wait — maybe it’s “corrosive” — but that’s a property.

I think there might be a mistake in the question, but for now, I’ll go with strong as the intended answer.

Later it says: “The chemical name for vinegar is ________.” We already have that.

And: “The chemical formula for this substance is ________.” For vinegar, it’s CH₃COOH.

Also: “Vinegar is an (acid/base) ________” → acid

Now, the last part: “The chemical name for vinegar is ________. Vinegar is used in cooking and cleaning. Its chemical formula for this substance is ________.”

We have:
→ acid
→ acetic acid
→ CH₃COOH

Back to the Drano part:

“Drano is a (acid/base) ________” → base

“A chemical is more dangerous than the ones used for cleaning drains. It is called sulfuric acid. Its chemical formula is H₂SO₄. These two compounds are very strong and have a (chemical) name: ________.”

Perhaps the blank is for “strong acid and strong base” — but it’s one blank.

Maybe “mineral” — but NaOH isn't mineral.

Another thought: in some contexts, they’re called “inorganic” — but acetic acid is organic.

I think the best guess is that they want strong — implying strong acid and strong base.

Perhaps “caustic” — but only for bases.

Let’s check online or standard answers — but since I can’t, I’ll assume for this level, they expect:

→ Drano is a base

→ The chemical name for the pair: strong (even though it's not perfect)

But wait — the sentence says “have a (chemical) name” — singular — so perhaps it’s “electrolyte” or something else.

I recall that strong acids and bases are sometimes collectively called "strong electrolytes", but that's not accurate because concentration matters.

Perhaps the answer is "corrosive" — but again, not a chemical name.

Let’s move on and come back.

Next: “An example of a food containing this acid is ________.” For lactic acid — yogurt, cheese, sourdough bread.

→ yogurt

Then: “Vinegar is an (acid/base) ________” → acid

“The chemical name for vinegar is ________.” → acetic acid

“Its chemical formula for this substance is ________.” → CH₃COOH

Also, earlier: “Its chemical name is ________, and its chemical formula is C₃H₆O₃.” for lactic acid — so we put lactic acid

Now, for the Drano/sulfuric acid part, let’s read carefully:

“Another product that is used all the time is Drano. Drano is a (acid/base) ________, and its chemical name is sodium hydroxide. Its chemical formula is NaOH. A chemical is more dangerous than the ones used for cleaning drains. It is called sulfuric acid. Its chemical formula is H₂SO₄. These two compounds are very strong and have a (chemical) name: ________.”

Perhaps the blank is for "strong" — and they mean they are strong acids/bases.

Maybe "ionic" — but not helpful.

Another idea: in some worksheets, they say "these are examples of strong acids and bases" — but here it's one blank.

Perhaps the answer is "caustic" — but sulfuric acid isn't caustic.

I think I found it: sometimes "caustic" is used for strong bases, and "corrosive" for strong acids, but not together.

Perhaps the blank is for "dangerous" — but that's not chemical.

Let’s look at the very end: “The chemical name for vinegar is ________. Vinegar is used in cooking and cleaning. Its chemical formula for this substance is ________.”

We have that.

Also, there’s a line: “The chemical name for vinegar is ________.” — same as before.

And: “The chemical formula for this substance is ________.” — CH₃COOH

Now, for the missing part: “These two compounds are very strong and have a (chemical) name: ________.”

I recall that in some contexts, they are called "strong electrolytes", but let's see if there's a better fit.

Perhaps "mineral acid" for sulfuric, but NaOH is not.

Another thought: sodium hydroxide is also known as "lye", and sulfuric acid as "battery acid", but not a common name for both.

I think the intended answer might be strong — as in strong acid and strong base.

Perhaps "corrosive" — but let's go with strong for now.

Let’s list all answers clearly.

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Final Answers:

Part 1:

1. Taste bitter → Base
2. Taste sour → Acid
3. Feels slimy or slippery → Base
4. Turns litmus paper blue → Base
5. Turns litmus paper red → Acid
6. Gives off hydrogen gas when it reacts with some metals → Acid

Part 2:

- The chemicals that produce these ions are called acids.
- Chemicals that produce hydroxide ions (OH⁻) in water are known as bases.
- Its chemical name is lactic acid, and its chemical formula is C₃H₆O₃.
- An example of a food containing this acid is yogurt.
- Drano is a base, and its chemical name is sodium hydroxide.
- These two compounds are very strong and have a (chemical) name: strong (assuming they mean strong acid and strong base).
- Vinegar is an acid that has a chemical name: acetic acid.
- Its chemical formula for this substance is CH₃COOH.

Note: For the "chemical name" of the pair (Drano and sulfuric acid), if "strong" is not accepted, it might be "corrosive" or "caustic", but based on typical middle school level, "strong" is likely expected.

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Final Answer:

Part 1:
1. Base
2. Acid
3. Base
4. Base
5. Acid
6. Acid

Part 2:
- acids
- bases
- lactic acid
- yogurt (or similar)
- base
- strong (or possibly "corrosive", but "strong" is safer)
- acid
- acetic acid
- CH₃COOH