Holooly Plus Logo
Holooly Plus Logo

Question 2.11: Writing the Formula from the Name of a Hydrate The mineral g...

Writing the Formula from the Name of a Hydrate

The mineral gypsum has the chemical name calcium sulfate dihydrate. What is the chemical formula of this substance?

The blue check mark means that this solution has been answered and checked by an expert. This guarantees that the final answer is accurate.
Learn more on how we answer questions.

Calcium sulfate is composed of calcium ions (Ca^{2+}) and sulfate ions (SO^{2-}_{4}), so the formula of the anhydrous compound is CaSO_4. Since the mineral is a dihydrate, the formula of the compound is CaSO_4 • 2H_2O.

Related Answered Questions

Question: 2.1

Writing Nuclide Symbols What is the nuclide symbol for a nucleus that contains 38 protons and 50 neutrons? ...

Verified Answer:

From the Table of Atomic Numbers and Atomic Weight...
Question: 2.5

Writing the Formula from the Name of an Ionic Compound Write formulas for the following compounds: a. iron(II) phosphate, b. titanium(IV) oxide. PROBLEM STRATEGY From the name of the compound, obtain the name of the ions, then write the formulas of the ions. Finally, use the method of Example 2.3 ...

Verified Answer:

a. Iron(II) phosphate contains the iron(II) ion, [...
Question: 2.4

Naming an Ionic Compound from Its Formula Name the following: a. Mg3N2, b. CrSO4. PROBLEM STRATEGY Note that the compounds in a and b contain both metal and nonmetal atoms, so we expect them to be ionic compounds. The first thing to do is write the formulas of the cations and anions in the compound ...

Verified Answer:

a. Magnesium, a Group IIA metal, is expected to fo...
Question: 2.3

Writing an Ionic Formula, Given the Ions a. Chromium(III) oxide is used as a green paint pigment (Figure 2.22). It is a compound composed of Cr^3+ and O^2- ions. What is the formula of chromium(III) oxide? b. Strontium oxide is a compound composed of Sr^2+ and O^2- ions. Write the formula of this ...

Verified Answer:

a. You can achieve electrical neutrality by taking...
Question: 2.2

Determining Atomic Weight from Isotopic Masses and Fractional Abundances Chromium, Cr, has the following isotopic masses and fractional abundances: Mass Number 50 52 53 54 Isotopic Mass (amu) 49.9461 51.9405 52.9407 53.9389 Fractional Abundance 0.0435 0.8379 0.0950 0.0236 What is the atomic weight ...

Verified Answer:

Multiply each isotopic mass by its fractional abun...
Question: 2.12

Balancing Simple Equations Balance the following equations. a. H3PO3 → H3PO4 + PH3 b. Ca + H2O → Ca(OH)2 + H2 c. Fe2(SO4)3 + NH3 + H2O → Fe(OH)3 + (NH4)2SO4 PROBLEM STRATEGY Look at the chemical equation for atoms of elements that occur in only one substance on each side of the equation. Begin by ...

Verified Answer:

a. Oxygen occurs in just one of the products [late...
Question: 2.10

Naming a Hydrate from Its Formula Epsom salts has the formula MgSO4 • 7H2O. What is the chemical name of the substance? ...

Verified Answer:

MgSO_4 is magnesium sulfate. [latex...
Question: 2.9

Writing the Name and Formula of an Anion from the Acid Selenium has an oxoacid, H2SeO4, called selenic acid. What is the formula and name of the corresponding anion? ...

Verified Answer:

When you remove two H^+ ions from [...
Question: 2.8

Naming a Binary Chemical Compound from Its Molecular Model Name the chemical compounds shown here. PROBLEM STRATEGY After recognizing that these are molecular compounds, start by writing down the elements using subscripts to denote how many atoms of each element occur in the compound. Next, ...

Verified Answer:

a. The elements in the compound are O and N. There...
Question: 2.7

Writing the Formula from the Name of a Binary Compound Give the formulas of the following compounds: a. disulfur dichloride, b. tetraphosphorus trisulfide. ...

Verified Answer:

You change the names of the elements to symbols an...