API-571 Exam - Topic 1 Question 109 Discussion

Actual exam question for API's API-571 exam

Question #: 109
Topic #: 1

[All API-571 Questions]

The presence of _________ can destabilize the scale and turn it into a nonprotective scale.

AHS

DHO

Show Suggested Answer

Suggested Answer: D

by Kenny at Apr 03, 2025, 10:43 PM

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Marya

5 months ago

O can also play a role in this, right?

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Susy

5 months ago

H is known to destabilize scales too.

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Audry

6 months ago

Wait, are we sure about that? Seems a bit off.

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Claribel

6 months ago

I disagree, I believe it's HS that does that.

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Elza

6 months ago

I think it's definitely HO that causes instability.

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Audra

6 months ago

I’m leaning towards C, but I wish I had reviewed more examples before the exam.

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Stephaine

6 months ago

I feel like it could be O, but I also remember something about H being involved in destabilization.

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Yoko

7 months ago

I remember a practice question about destabilizing factors, but I can't recall if it was HS or HO.

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Ocie

7 months ago

I think the answer might be H, but I'm not entirely sure. We discussed how certain compounds can affect stability.

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Kayleigh

7 months ago

Ah, I think I know the answer to this. The presence of certain elements can disrupt the protective properties of a scale. I'll go with my best guess.

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Ranee

7 months ago

I'm a bit unsure about this one. I'll need to review my notes and try to reason through the possible answers.

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Lanie

7 months ago

Okay, let's see. I remember learning about different elements that can affect scale stability. I'll try to recall that information and apply it here.

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Whitney

8 months ago

Hmm, this seems like a tricky one. I'll need to think carefully about the different factors that can destabilize a scale.

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Carlene

1 year ago

Ooh, this is a tricky one. I'm torn between C and D, but I'm gonna go with D. HO. Hydroxide seems like it could really do a number on that scale.

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Colette

12 months ago

I agree, both C and D could be potential destabilizers for the scale.

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Miles

1 year ago

I'm leaning towards C. H. It seems like it could also destabilize the scale.

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Geoffrey

1 year ago

I think you might be onto something with D. HO. Hydroxide can definitely mess with the scale.

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Omega

1 year ago

Haha, looks like we're trying to find the right element to mess up the scale. I'll go with A. HS - sulfur always causes trouble!

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Azalee

12 months ago

I'm not sure, but I'll go with C) H just to mix things up.

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Marica

1 year ago

I think oxygen could also be a troublemaker. I'll choose B) O.

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Danica

1 year ago

I agree, sulfur can definitely mess things up. I'll go with A) HS too.

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Rodolfo

1 year ago

But what about H? I think it could also be a potential destabilizer.

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King

1 year ago

Hmm, I'm gonna go with B. O. Oxygen is known to cause issues with protective scales, right?

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Deangelo

11 months ago

I agree, oxygen is a key player in this scenario.

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Roxanne

11 months ago

Yes, oxygen is a common factor in scale destabilization.

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Adell

11 months ago

I think you're right, oxygen can definitely destabilize protective scales.

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Quinn

12 months ago

D) HO

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Marsha

12 months ago

C) H

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Kasandra

1 year ago

B) O

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Precious

1 year ago

A) HS

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Tegan

1 year ago

C. H seems like the right choice here. Hydrogen can definitely destabilize the scale.

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Jessenia

1 year ago

I disagree, I believe it's O that can turn the scale into a nonprotective one.

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Rodolfo

1 year ago

I think the presence of HS can destabilize the scale.

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Denise

1 year ago

I think the answer is D. HO. It makes the most sense to me.

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Grover

1 year ago

Actually, the correct answer is A) HS. It is the presence of HS that can destabilize the scale.

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Carlota

1 year ago

I think the answer is D. HO. It makes the most sense to me.

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