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- https://chem.libretexts.org/Bookshelves/Introductory_Chemistry/Introductory_Chemistry_(CK-12)/11%3A_Chemical_Reactions/11.04%3A_Combination_ReactionsThis page explains the enhanced function of a wheel rim when combined with a tire for a safe ride. It also discusses combination reactions, where multiple substances unite to form new ones, such as el...This page explains the enhanced function of a wheel rim when combined with a tire for a safe ride. It also discusses combination reactions, where multiple substances unite to form new ones, such as elements reacting with oxygen to create oxides. The text provides examples of balancing equations for these reactions, including potassium oxide formation and the reaction of calcium oxide with water.
- https://chem.libretexts.org/Bookshelves/Analytical_Chemistry/Instrumental_Analysis_(LibreTexts)/27%3A_Gas_ChromatographyIn gas chromatography (GC) we inject the sample, which may be a gas or a liquid, into a gaseous mobile phase (often called the carrier gas). The mobile phase carries the sample through a packed or cap...In gas chromatography (GC) we inject the sample, which may be a gas or a liquid, into a gaseous mobile phase (often called the carrier gas). The mobile phase carries the sample through a packed or capillary column that separates the sample's components based on their ability to partition between the mobile phase and the stationary phase. By adjusting conditions it usually is possible to design a separation so that analytes elute by themselves, even when the mixture is complex.
- https://chem.libretexts.org/Bookshelves/Introductory_Chemistry/Introductory_Chemistry_(CK-12)/02%3A_Matter_and_Change/2.09%3A_Heterogeneous_MixturesThis page explains heterogeneous mixtures, highlighting their non-uniform composition using jelly beans as an analogy for selective consumption. It includes examples like vegetable soup and soil, show...This page explains heterogeneous mixtures, highlighting their non-uniform composition using jelly beans as an analogy for selective consumption. It includes examples like vegetable soup and soil, showing distinct phases within the mixtures. Additionally, smog is mentioned as an inconsistent heterogeneous mixture. The concept of a phase is clarified as a distinct layer, contrasting with pure substances that are single-phase.
- https://chem.libretexts.org/Bookshelves/Introductory_Chemistry/Introductory_Chemistry_(CK-12)/15%3A_Water/15.03%3A_Physical_Properties_of_WaterThis page discusses the global challenge of water loss due to evaporation, prompting farmers to consider measurement tools like evaporation pans. It highlights water's unique physical properties, incl...This page discusses the global challenge of water loss due to evaporation, prompting farmers to consider measurement tools like evaporation pans. It highlights water's unique physical properties, including high melting and boiling points due to hydrogen bonding, as well as high surface tension. The page also explains that water has a low vapor pressure that increases with temperature, affecting the rate of molecules transitioning to the vapor phase.
- https://chem.libretexts.org/Bookshelves/Introductory_Chemistry/Introductory_Chemistry_(CK-12)/01%3A_Introduction_to_Chemistry/1.05%3A_Pure_and_Applied_ChemistryThis page discusses the division of chemistry research into pure and applied categories. Pure research seeks to enhance knowledge without immediate applications, while applied research uses existing k...This page discusses the division of chemistry research into pure and applied categories. Pure research seeks to enhance knowledge without immediate applications, while applied research uses existing knowledge for practical goals. The line between the two can be blurred, as pure research may lead to practical uses, as shown by hemoglobin studies that aid sickle cell anemia treatments. Ultimately, pure research centers on understanding, while applied research prioritizes practical utility.
