<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Jana  Braniša</style></author><author><style face="normal" font="default" size="100%">Zita  Jenisová</style></author><author><style face="normal" font="default" size="100%">Martin  Bílek</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">COMPUTER SUPPORTED SCHOOL CHEMICAL EXPERIMENT IN COMPLEX APPROACH – “ACIDIC BUBBLES”</style></title><secondary-title><style face="normal" font="default" size="100%">Problems of Education in the 21st Century</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">chemical experiment</style></keyword><keyword><style  face="normal" font="default" size="100%">complex experiment</style></keyword><keyword><style  face="normal" font="default" size="100%">computer school</style></keyword><keyword><style  face="normal" font="default" size="100%">everyday chemistry</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2011</style></year><pub-dates><date><style  face="normal" font="default" size="100%">December/2011</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://oaji.net/articles/2014/457-1408435680.pdf</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">37</style></volume><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Digital technologies are used in experimental practice under school conditions mainly for data statistic processing, computer modeling of natural principles and supporting the real experiments by computer, so that the measurement process can occur simultaneously with data recording during experiments. This study is focused on the use of computer within real experimenting. We have chosen the experiment “Acidic bubbles” as an example of running the computer-aided real experiment. Solubility of carbon dioxide (CO2) in the liquid is influenced by characteristics of the solvent and the solute, pressure and temperature. The aim of the experiments is to show changes in pH values in water/carbon dioxide (H2O/CO2) mixtures (differing in various CO2 content) in time and temperature. Experiments confirmed that the temperature increased in relation to increasing pH. CO2 solubility decreased along with increasing temperature and the resulting lower concentration of CO2 in the mixture also caused the reduction of the carbonic acid (H2CO3) concentration. Moreover, the acid was decomposed by the influence of the higher temperature. Advantages of using the measuring systems can be seen in their supportive functions leading to investigative experimental activities of students, which are gradually disappearing from both primary and secondary schools for various reasons. Advantages of this approach are increasing by applications connected with everyday life products as in presented example “Soda-stream” device in the kitchen.</style></abstract><work-type><style face="normal" font="default" size="100%">Original article</style></work-type><section><style face="normal" font="default" size="100%">29-37</style></section></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Martin Adamec</style></author><author><style face="normal" font="default" size="100%">Pavel Beneš</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">SCHOOL CHEMICAL EXPERIMENT OPTIMIZATION IN WOLFRAM MATHEMATICA ENVIRONMENT</style></title><secondary-title><style face="normal" font="default" size="100%">Problems of Education in the 21st Century </style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">chemical experiment</style></keyword><keyword><style  face="normal" font="default" size="100%">school experiment</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2009</style></year><pub-dates><date><style  face="normal" font="default" size="100%">May/2009</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://oaji.net/articles/2014/457-1392408001.pdf</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">11</style></volume><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">An experiment is an integral part of natural sciences, especially chemistry. Therefore pupils and students should be in contact with it on regular bases during the process of learning chemistry. However, nowadays a major decrease of use of real chemical experiments is apparent in chemistry education. New or modified known experiments can help to reduce this trend. The proposed method of experiment optimization using Wolfram Research software Mathematica is one of the possible ways how to solve it. This method is based on sequential process of optimization and stochastic extreme value finding for functions of several variables. This problem has been solved at the Department of Chemistry and Chemistry Didactics as a part of a research project entitled “Teacher Profession in Changing Requirements on Education”, executed by Faculty of Education. During the research a program was made that computes optimal values of experiment parameters from measured values. This was verified during teacher training courses at Charles University in Prague, Faculty of Education. This paper presents an example that shows the optimization procedure of a selected chemical reaction.</style></abstract><work-type><style face="normal" font="default" size="100%">Original article</style></work-type><section><style face="normal" font="default" size="100%">9-13</style></section></record></records></xml>