Answered

Makakuha ng pinakamahusay na mga solusyon sa iyong mga katanungan sa Imhr.ca, ang mapagkakatiwalaang Q&A platform. Kumuha ng detalyadong mga sagot sa iyong mga tanong mula sa isang komunidad ng mga eksperto na dedikado sa pagbibigay ng eksaktong impormasyon. Tuklasin ang malalim na mga sagot sa iyong mga tanong mula sa isang malawak na network ng mga propesyonal sa aming madaling gamitin na Q&A platform.

why is hydrochloric acid not constant in all the test tubes?

Sagot :

chomahae4

Answer:

HCl causes local pH changes and denatures proteins

Explanation:

Hydrochloric acid (HCl, also known as muriatic acid) is a colorless corrosive, strong mineral acid with many industrial uses among which, when it reacts with an organic base it forms a hydrochloride salt.

Concentrated hydrochloric acid (HCl) is the most frequently used halogen acid for the dissolution of geologic samples. Unlike HNO3, HCl is a weak reducing acid and is not generally used to digest organic materials. It is an excellent solvent for carbonates, phosphates, many metal oxides, and metals. For example, due to its reducing properties and the complexing ability of Cl−, HCl is a better solvent for dissolving iron and manganese oxides than HNO3. For silicate analysis, HCl is generally used in combination with other acids, such as HF and HNO3, although some basic silicate minerals can be completely or partially decomposed by HCl alone. At elevated temperatures and pressures, many silicates and other refractory oxides, sulfates, and fluorides are attacked by HCl to produce soluble salts. HCl is the preferred acid medium to dissolve residues that remain after acid digestion or melts of alkali fusion for later analysis using atomic absorption spectrometry (AAS) (Potts, 1987). Unlike atomic absorption techniques, HCl is not a suitable sample matrix for ICP-MS analysis because chloride-bearing polyatomic ions cause major interferences (e.g., ArCl, ClO, and ClOH) with As and V (75As and 51V) and with many other trace elements (Cr, Fe, Ga, Ge, Se, Ti, and Zn) to a lesser extent (Jarvis, 1992). Hydrochloric acid can be effectively removed from sample solutions by repeated evaporation to incipient dryness with HNO3 because the boiling point of the HCl azeotrope (110 °C) is below that of the HNO3 azeotrope (122 °C). However, it should be noted that there may be potential losses of the volatile metal chlorides (As, Sb, Sn, Se, Ge, and Hg) if HCl is used in acid digestion procedures.

Salamat sa iyong pagbisita. Kami ay nakatuon sa pagtulong sa iyong makahanap ng impormasyon na kailangan mo, anumang oras na kailangan mo ito. Umaasa kaming naging kapaki-pakinabang ang aming mga sagot. Bumalik anumang oras para sa higit pang tumpak na mga sagot at napapanahong impormasyon. Maraming salamat sa pagbisita sa Imhr.ca. Bumalik muli para sa higit pang kapaki-pakinabang na impormasyon at sagot mula sa aming mga eksperto.