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Chapter 22: Problem 101

Manganese silicide has the empirical formula \(\mathrm{MnSi}\) and melts at \(1280^{\circ} \mathrm{C}\). It is insoluble in water but does dissolve in aqueous HF. (a) What type of compound do you expect \(\mathrm{MnSi}\) to be: metallic, molecular, covalent-network, or ionic? (b) Write a likely balanced chemical equation for the reaction of MnSi with concentrated aqueous \(\mathrm{HF}\).

Short Answer

Expert verified
MnSi is most likely a covalent-network compound. The balanced chemical equation for the reaction of MnSi with concentrated aqueous HF is: \(MnSi + 4HF \rightarrow MnF_2 + SiF_4\).

Step by step solution

01

Identify the type of compound MnSi

MnSi is formed from Mn (a transition metal) and Si (a metalloid). Metal-metalloid compounds usually form covalent bonds, which result in covalent-network solids. Therefore, MnSi is most likely a covalent-network compound.
02

Write a balanced chemical equation for the reaction of MnSi with aqueous HF

Since MnSi is a covalent-network compound that dissolves in aqueous HF, it will likely react with HF to form fluoro complexes (i.e. MnF2, SiF4). MnSi + 4HF -> MnF2 + SiF4 This balanced equation represents the reaction of MnSi with concentracted aqueous HF.

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Most popular questions from this chapter

When aluminum replaces up to half of the silicon atoms in \(\mathrm{SiO}_{2}\), a mineral class called feldspars result. The feldspars are the most abundant rock-forming minerals, comprising about \(50 \%\) of the minerals in Earth's crust. Orthoclase is a feldspar in which Al replaces one-fourth of the Si atoms of \(\mathrm{SiO}_{2},\) and charge balance is completed by \(\mathrm{K}^{+}\) ions. Determine the chemical formula for orthoclase.

(a) How does the structure of diborane $\left(\mathrm{B}_{2} \mathrm{H}_{6}\right)\( differ from that of ethane \)\left(\mathrm{C}_{2} \mathrm{H}_{6}\right) ?$ (b) Explain why diborane adopts the geometry that it does. (c) What is the significance of the statement that the hydrogen atoms in diborane are described as "hydridic"?

Write a balanced equation for the reaction of each of the following compounds with water: (a) \(\mathrm{PCl}_{5}(s),\) (b) \(\mathrm{CO}_{2}(g)\) (c) \(\mathrm{K}_{2} \mathrm{O}_{2}(s)\) (d) \(\mathrm{Mg}_{3} \mathrm{P}_{2}(s)\) (e) \(\operatorname{LiAlH}_{4}(s)\) (f) \(\mathrm{Cl}_{2} \mathrm{O}(g)\) (g) \(\mathrm{NO}_{2}(g)\)

Write the formulas for the following compounds, and indicate the oxidation state of the group 14 element or of boron in each: (a) stannous fluoride, (b) germane, (c) diborane, (e) tin selenide, (d) tin(II) sulfate, (f) zinc carbonate.

Write a balanced equation for each of the following reactions: (a) Sulfur dioxide reacts with water. (b) Solid zinc sulfide reacts with hydrochloric acid. (c) Elemental sulfur reacts with sulfite ion to form thiosulfate. (d) Sulfur trioxide is dissolved in sulfuric acid.
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