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

Limited Time Offer

25%

Off

Get Premium API-571 Questions as Interactive Web-Based Practice Test or PDF

Contribute your Thoughts:

Submit Cancel

Marya

8 months ago

O can also play a role in this, right?

upvoted 0 times

...

Susy

8 months ago

H is known to destabilize scales too.

upvoted 0 times

...

Audry

9 months ago

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

upvoted 0 times

...

Claribel

9 months ago

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

upvoted 0 times

...

Elza

9 months ago

I think it's definitely HO that causes instability.

upvoted 0 times

...

Audra

9 months ago

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

upvoted 0 times

...

Stephaine

10 months ago

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

upvoted 0 times

...

Yoko

10 months ago

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

upvoted 0 times

...

Ocie

10 months ago

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

upvoted 0 times

...

Kayleigh

10 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.

upvoted 0 times

...

Ranee

10 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.

upvoted 0 times

...

Lanie

10 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.

upvoted 0 times

...

Whitney

11 months ago

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

upvoted 0 times

...

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.

upvoted 0 times

Colette

1 year ago

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

upvoted 0 times

...

Miles

1 year ago

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

upvoted 0 times

...

Geoffrey

1 year ago

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

upvoted 0 times

...

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!

upvoted 0 times

Azalee

1 year ago

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

upvoted 0 times

...

Marica

1 year ago

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

upvoted 0 times

...

Danica

1 year ago

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

upvoted 0 times

...

Rodolfo

1 year ago

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

upvoted 0 times

...

King

1 year ago

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

upvoted 0 times

Deangelo

1 year ago

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

upvoted 0 times

...

Roxanne

1 year ago

Yes, oxygen is a common factor in scale destabilization.

upvoted 0 times

...

Adell

1 year ago

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

upvoted 0 times

...

Quinn

1 year ago

D) HO

upvoted 0 times

...

Marsha

1 year ago

C) H

upvoted 0 times

...

Kasandra

1 year ago

B) O

upvoted 0 times

...

Precious

1 year ago

A) HS

upvoted 0 times

...

Tegan

1 year ago

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

upvoted 0 times

...

Jessenia

1 year ago

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

upvoted 0 times

...

Rodolfo

1 year ago

I think the presence of HS can destabilize the scale.

upvoted 0 times

...

Denise

1 year ago

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

upvoted 0 times

Grover

1 year ago

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

upvoted 0 times

...

Carlota

1 year ago

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

upvoted 0 times

...