O composto ácido acético é obtido por meio do metabolismo de micro-organismos, principalmente bactérias, que utilizando uma fonte de carbono em um processo fermentativo o liberam como metabólito. Tem-se conhecimento do ácido acético desde os primórdios da humanidade. O filósofo grego Theophrastos, no século III a. C, retratou o vinagre como uma substância que interagia com metais produzindo pigmentos, muito utilizados nas pinturas da época, devido a sua força de acidez fraca, que apresenta uma constante de ionização 1,8∙10^–5, então, qual será o grau de ionização desse ácido em água, de uma solução 0,045 mol/L do referido ácido? HAc --> H+1 + Ac–1

Follow the steps provided in the simulation to add water to the graduated cylinder, select one of the three samples (copper, silver, or gold), set its mass to the values given in the statements below, and calculate its density. here is a summary of the steps required: add water by clicking and holding prepare a known volume of water button. until the desired volume of water has been added. if more than the desired volume is added, click the reset button. button and redo the procedure. a single click will add about 21.0 ml of water. to set the mass, click and hold weigh out metal button. until the desired amount of metal is added to the weighing pan. once the desired mass of the metal is added, release the button. transfer the metal to water and then click on calculate density button. to see how the density is calculated using water displacement to measure the volume of the solid. to save time you can approximate the initial volume of water to â±1 ml and the initial mass of the solid to â±1 g. for example, if you are asked to add 23 ml of water, add between 22 ml and 24 ml. which metals in each of the following sets will have equal density? check all that apply.

The human activities in two locations are described below: location a: rampant use of plastic containers location b: excessive use of pesticides and fertilizers which statement is most likely true? location a will have poor air quality because plastic is biodegradable. location a will experience water scarcity because plastic absorbs moisture. the population of honeybees will increase in location b because production of crops will increase. the population of fish in location b will decrease because the water is contaminated.

The following questions a24 - a26 relate to 100 ml of 0.0150 m solution of benzoic acid (c6h3cooh). ka(c6h3cooh) = 6.4 x 10^-5. what is the ph of the solution after the addition of 1 x 10^-3 moles of naoh? you may assume no volume change to the solution upon addition of the naoh.