Double replacement lab
Double replacement reactions lab 10.2 answers
When a double replacement reaction occurs, the cations and anions switch partners, resulting in the formation of water and a new ionic compound or salt , which is usually soluble. Hypothesis If double replacement does happen, then it will be shown if a precipitate formed, there is a release of gas or permanent color change because when double replacement reaction happens there will be a chemical reaction from the different elements in the combine with other elements in the other compound. Do not write an equation for no reactions NR. A good estimate is to use three full dropper squirts of each chemical. Most phosphates, carbonates, chromates and sulfides are insoluble except those of the alkali metals and ammonium. Even though there were many examples of double replacement happening through precipitates being formed an permanent color changes, there was only one example of a release of gas with a mix of Nitric Acid HNO3 and Sodium Carbonate Na2Co3. Related documents. If the substance no longer had an aqueous solution after the double replacement, then the substance would be a precipitate. When a double replacement reaction occurs, the cations and anions switch partners, resulting in the formation of two new ionic compounds AD and CB, one of which is in the solid state. To determine whether a product ionic compound will be soluble or insoluble, consult the Solubility Rules provided at the end of the Background section. Some of your precipitates had a very distinct color. Note that if both of the predicted products are soluble, a precipitation reaction will not occur. Students will practice writing and balancing double-replacement reactions. Above is a list of 12 reactions. This decreased the amount of evidence we had to support our hypothesis.
The drop bottles contained different compounds which were dropped into the spot plates and mixed together. Also we did not write out the equation for each of the combinations that showed any type of reactivity.
Students will practice writing and balancing double-replacement reactions. There were many examples of a precipitate being formed and of permanent color changes. Performing Drop Reactions 1.
Another error that may have taken place was measuring the amount of each compound to put into the micro plate. What is a precipitate? These two ions combined together, would form a precipitate, which would help clearly show the presence of silver in the substance.
Pre-Lab questions: 1. Be sure to include the physical states of all reactants and products in your final equation. Purpose The purpose of this lab was to observe the results of many double replacement reactions, as well as to practice writing non-ionic, complete ionic, and net ionic equations for precipitation reactions.
based on 3 review