Is iron sulfide soluble in acid?

Generally, the iron sulfide scale is soluble in hydrochloric acid and organic acids as formic acid (HCOOH) [6]. When the iron scale depositions contain low sulfur content, it would have a higher degree of solubility in HCl acid [17].

What is iron sulfide soluble in?

Melting point. 1,194 °C (2,181 °F; 1,467 K) Solubility in water. negligible (insoluble) Solubility.

Which chemical is most suitable for the removal of calcium sulphate scale?

According to the present invention, calcium sulfate scale is removed by direct dissolution using DTPA as the chelating agent. The method is particularly useful for the removal of such scale from oil field equipment used to bring oil and/or water from subterranean formations to the surface.

Why is FeS insoluble?

The compound FeS is insoluble. According to the solubility rules, sulfide salts of transition metals are insoluble. Fe is a transition metal and S2− is the sulfide ion. Thus, we classify the compound as insoluble.

How do you dissolve iron sulfide?

Hydrochloric acid (HCl) is used to dissolve FeS because it is readily available and reacts very quickly. It is well known that HCl can cause corrosion problems and lead to greater amounts of H2S production, consequently precipitating sulfur (Nasr-El-Din et al.

Is calcium sulfide soluble or insoluble?

Calcium sulfide is slightly soluble in water but insoluble in alcohol. It reacts with acids, producing hydrogen sulfide gas. Calcium sulfide is pale yellow to light gray with a bitter taste. It is hygroscopic, producing an odor of H2S in moist air.

What is the solubility of CaSO4?

WaterCalcium sulfate / Soluble in

Would you expect the solubility of calcium sulfate to increase or decrease with increasing temperature?

The solubility of calcium sulfate decreases as temperature increases.

Why is FeS insoluble in water?

What is calcium soluble in?

water
The sulfates of all metals except lead, mercury (I), barium, and calcium are soluble in water.