Beer’s Law Lab Explained: Absorbance vs. Concentration

Introduction: According to Beer’s Law, A=Ebc, under ideal conditions, a substance’s concentration and its absorbance are directly proportional: a high-concentration solution absorbs more light, and solution of lower concentration absorbs less light. Since concentration and absorbance are proportional, Beer’s Law makes it possible to determine an unknown concentration of phosphate after determining the absorbance. The…

Dihybrid Cross Practice Problems

Directions: Complete the following Dihybrid Cross problems. Identify the gametes from each parent. Complete a Punnett Square for the cross Identify the genotypes and phenotypes for the potential offspring. Find the phenotypic ratio for the potential offspring. Betta (Chinese/ Siamese fighting fish) Characteristics [Upper Case= Dominant & Lower Case= Recessive] B= Blue Tail                                                         b= black…

Digestive System Terms & Definitions

Balanced Diet: Suitable amounts of all nutrients (carbohydrates, proteins, lipids, mineral salts, vitamins, fibre and water) required for normal healthy living. Autotrophic Feeding: Way of feeding; food is made by the plants themselves. Heterotrophic Feeding: Way of feeding; animals feed on ready made food. Digestion: Large insoluble molecules of food are broken down to small…

Somatropin (Human Growth Hormone): Production & Function

Somatropin, also known as Human Growth Hormone (HGH) or even sometimes just Growth Hormone (GH) is a hormone created in the pituitary gland dealing with growth. Before somatropin can be created, Human Growth Hormone Releasing Hormone (HGHRH) and Somatostatin (SST) are released by the Hypothalamus. Many factors can influence HGH release, of which the main…

Titration Lab: NaOH with Standardized solution of KHP

Aim To standardize a sodium hydroxide (NaOH) solution against a primary standard acid [Potassium Hydrogen Phthalate (KHP)] using phenolphthalein as indicator. Variables Independent variables Mass of KHP (mKHP) Volume of KHP solution Dependent variables Volume of NaOH added [since the colour change will not happen at exactly the same volume of NaOH added (VNaOH)] Controlled…

Global Warming, Sea Level Rise and Bangladesh

The global average air and ocean temperatures have been gradually increasing from 1880-2010 (Fig.1) This increase in temperature melted a massive amount of ice and snow globally which ultimately, caused the global average sea level to also rise (Fig.2). The Earth’s average surface temperature rose by 0.74 ± 0.18°C over the period 1906–2005.  Global average…

The Eruption of Mount Tambora: Causes, Event, Effect

Mount Tambora, is an active stratovolcano famous for its eruption in 1815 which was considered one of the most explosive volcanic eruptions in Earthʼs history. A stratovolcano is a volcano characterized by its steepness and periodic explosive eruptions and quiet eruptions. It is also known as a composite volcano because it is composed of layers…