Net Ionic Equations

Net Ionic Equations Objective: In this lesson, the student will learn how to identify and write net ionic equations.Net ionic equations result from double displacement reactions in which free ions in aqueous solution react to form either a precipitate, a gas, a weak electrolyte, or water.Strategy for Writing Net Ionic EquationsIf one reactant is an acid, check for gaseous products (i.e., CO2, H2S, SO2, or NH3 gases).If one reactant is a base, check for gaseous products (i.e., NH3 or CO2 gases).An acid + a base produces a salt + water.Check for precipitates using the activity series of metals and a solubility table.Activity Series of Metals Solubility TableRemember!All chemical equations must be balanced.In double displacement reactions, the sum of ion charges on both sides of the equation must be balanced.ExampleWrite a balanced net ionic equation for the reaction of aqueous solutions of sodium sulfide and hydrochloric acid. Na2S (aq) + HCl (aq) ? ? If one reactant is an acid (HCl), check for gaseous products.Na2S (aq) + HCl (aq) ? H2S (g) + NaCl (aq)Balance. Na2S (aq) + 2 HCl (aq) ? H2S (g) + 2 NaCl (aq) The above is called a molecular equation: all reactants and products are expressed as compounds.From the molecular equation, identify the ions in solution. Note that the H2S is a gas and is not in aqueous solution. 2 Na+ (aq) + S2- (aq) + 2 H+ (aq) + 2 Cl- (aq) ? H2S (g) + 2 Na+ (aq) + 2 Cl- (aq) The aqueous 2 H+ and S2- ions react to form H2S (g). The remaining aqueous 2 Na+ and 2 Cl- ions appear on both sides of the equation and are spectators. That is, they do not participate in the reaction and can be eliminated.2 Na+ (aq) + S2- (aq) + 2 H+ (aq) + 2 Cl- (aq) ? H2S (g) + 2 Na+ (aq) + 2 Cl- (aq) After eliminating the spectator ions from the reaction, the net ionic equation is S2- (aq) + 2 H+ (aq) ? H2S (g)

Are You Trying to Learn Algebra Online? Find Out How You Can Do it Fast

Are You Trying to Learn Algebra Online? Find Out How You Can Do it FastIf you want to learn the art of algebra, then you can be guaranteed that by hiring a good mathematical or academic tutor, you will be able to learn how to do it in the fastest possible time. And this is the reason why more parents are choosing to hire a tutor for their child who would need to learn algebra.Most people find it hard to choose which college to go to because they cannot afford to send their children to different colleges. With the advent of online education, more students have realized that there is no need to spend thousands of dollars on their college education. By just sending their child to a good school where they can learn algebra at their own pace, they can do the same thing at home.Cognitive tutors are actually professionals in the field of mathematics. It is very important for them to understand the particular subject matter that the student is dealing with, which is why they need to consult their students before they learn the subject.The students should know that every individual student has unique needs and there are no two individuals who need the same algebra. The students should know that there are different ways in which a tutor can help them learn math. So if you would like to learn math, there are several ways in which you can go about doing so.You can choose to go through the traditional way and hire a tutor from a school. But if you think this is not an option for you, you can also try to work on your own and learn how to do it on your own. Learning algebra on your own can be done only by students who are comfortable with learning stuff on their own and who have the right attitude towards this subject.This will help the child's mind to focus in studying the subject matter and will enable them to learn without the child worrying about getting in trouble. So if you think that it will not work for you, then you can also try the online option. By just logging int o the internet, you can immediately start learning algebra for free.But before you start, you need to make sure that you are going to start using an online learning option that is not only suited for your needs but also within your budget. The most important thing is that you should make sure that you are able to meet the learning standards that are set for students in the same field.

Chemistry in Art - Combining Science and Art to Create a Variety of Experiences

Chemistry in Art - Combining Science and Art to Create a Variety of ExperiencesOne of the most interesting aspects of chemistry in art is the blending of art and science. Often a combination of art and science is done that has been an ongoing theme of the artist since his or her beginning. The chemistry in art combines both to create a unique and exciting mixture.This includes the chemistry of art. Many artists consider the science of chemistry as an essential component to their art. It's not unusual for people to combine science and art into one medium. One might consider as much art in chemistry as there is in music, or music and literature.However, it is always difficult to obtain a blend of art and science that is perfectly accurate. Some of the more famous examples of this are Thomas Kinkade's painting of the wedding ring in 'Two Women with Rings', which is based on a picture of a wedding band found in a bottle of champagne. In the same vein, David Lynch's film The Elephant Man, in which the title character becomes possessed by the evil Dr. Joseph Merrick, is based on Merrick's work in the science of phlogiston.Another chemistry in art example is a painting of a fire starting in the brush strokes of the painter. The combination of art and science is best appreciated by the viewer, since the artist knows the results that he is attempting to achieve. In the instance of art, the scientific balance is never established until the work is completely completed. Sometimes the balance of the two comes together in a way that is artistic in its own right.There are a number of chemists who have chosen to use chemistry in art to emphasize the beauty of their work. The canvas for their paintings is often colored to complement the theme of the chemistry in art. For example, a female figure in a lab coat, accompanied by a red rose, may be done in red to evoke a chemical reaction between the red and the colors found in the painting, for example.Chemistry in art example is to create a painting that involves a mixture of the elements on one side of the canvas and a traditional representation of the element on the other side. In the case of the painting 'Astonyx' by the artist Mark Sandison, an observer can look at the color palette of the painting, the layout of the painting, and the level of detail from the zebra striped cover on the cover. From the zebra striped cover, the chemist can deduce that there are five different colors in the painting, and that there is no additional information about the element composition given.Chemistry in art is a great way to display the important role that scientists play in the history of art. The combination of science and art helps draw the viewer into the world of science, where they are more likely to be interested in learning more about the chemistry in art. This is part of the excitement that we all seek from our daily lives. It is not only the science in art that will enhance that experience, but also the chem istry in art.