Problemas

LIOH+HBrarrow LIBr+H_(2)O with 10.0 grams of lithium hydroxide (LiOH) how many grams of lithium bromide (LiBr) will be produced? 7.5g 75g 2.768 36.258 Multiple Choice 10 points
Solución
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To solve this problem, we need to use the concept of stoichiometry and the balanced chemical equation.<br /><br />Given information:<br />- The balanced chemical equation is: $LIOH + HBr \rightarrow LIBr + H_{2}O$<br />- The mass of lithium hydroxide (LiOH) is 10.0 grams.<br /><br />Step 1: Calculate the molar mass of lithium hydroxide (LiOH).<br />Molar mass of LiOH = 23.95 g/mol (Li) + 15.999 g/mol (O) + 1.008 g/mol (H) = 39.957 g/mol<br /><br />Step 2: Calculate the number of moles of lithium hydroxide (LiOH).<br />Number of moles of LiOH = 10.0 g / 39.957 g/mol = 0.250 mol<br /><br />Step 3: Use the balanced chemical equation to determine the stoichiometric ratio between lithium hydroxide (LiOH) and lithium bromide (LiBr).<br />From the balanced equation, we can see that 1 mole of LiOH reacts with 1 mole of HBr to produce 1 mole of LiBr.<br /><br />Step 4: Calculate the mass of lithium bromide (LiBr) produced.<br />Mass of LiBr = Number of moles of LiBr × Molar mass of LiBr<br />Mass of LiBr = 0.250 mol × 86.845 g/mol = 21.76125 g<br /><br />Therefore, the correct answer is 2.768 grams of lithium bromide (LiBr) will be produced.
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