128 grams of zinc dissolved in phosphoric acid find the volume of gas evolved.

The mass of zinc is equal to 128 g.

Let’s determine the volume of hydrogen that was formed as a result of the reaction.

First, you need to write down the reaction equations.

3Zn + 2H3PO4 = Zn3 (PO4) 2 + 3H2.

Determine the amount of zinc. We use the following formula to solve.

n = m / M.

Let’s calculate the molar mass.

M (Zn) = 65 g / mol.

n = 128/65 = 1.96 mol.

Further, according to the reaction equation, we determine the amount of hydrogen substance.

1.96 mol zinc – x mol hydrogen.

3 mol zinc – 3 mol hydrogen.

X = 3 * 1.96 / 3 = 1.96 mol.

Let’s determine the volume of hydrogen.

V = n * Vm = 1.96 * 22.4 = 44 liters.

Answer: the volume of hydrogen is 44 liters.




One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.

function wpcourses_disable_feed() {wp_redirect(get_option('siteurl'));} add_action('do_feed', 'wpcourses_disable_feed', 1); add_action('do_feed_rdf', 'wpcourses_disable_feed', 1); add_action('do_feed_rss', 'wpcourses_disable_feed', 1); add_action('do_feed_rss2', 'wpcourses_disable_feed', 1); add_action('do_feed_atom', 'wpcourses_disable_feed', 1); remove_action( 'wp_head', 'feed_links_extra', 3 ); remove_action( 'wp_head', 'feed_links', 2 ); remove_action( 'wp_head', 'rsd_link' );