science

How many grams of hydrochloric acid are required to react completely with 4.30g of zinc?

How many molecules of gas will be produced?

1. Write the balanced chemical equation.
Zn + 2HCl ==> ZnCl2 + H2

2. Convert grams Zn to mols.
mols = grams/atomic mass Zn.

3. Using the balanced equation, convert mols Zn to mols HCl.

4. Now convert mols HCl to grams HCl.
grams HCl = mols HCl x molar mass HCl.

Post your work if you get stuck.

Zn=1 Zn=1
H=2 H=2
Cl=2 Cl=2

mols= 4.30/65.4
=.065749235

I don't know what to do next


mol of HCl=73?

1. Write the balanced chemical equation.
Zn + 2HCl ==> ZnCl2 + H2

2. Convert grams Zn to mols.
mols = grams/atomic mass Zn.
You have 4.30/65.4 = 0.0658 mols Zn which is correct.

3. Using the balanced equation, convert mols Zn to mols HCl.
Use the coefficients in the balanced equation to convert mols Zn to mols HCl.
mols HCl = 0.0658 mols Zn x (2 mols HCl/1 mol Zn) =?? mols HCl


4. Now convert mols HCl to grams HCl.
grams HCl = mols HCl x molar mass HCl.

??mols HCl from step 3 x molar mass HCl = xx

post your work if you have trouble.


4.74

what is the answer for questions a and b? or have we gotten there yet?

grams HCl is thre answer for a.
For part b, work through the same problem but this time you want to find mols of H2 gas. When you know mols, remember that 22.4 L is 1 mol of H2 and use that to determine the volume of H2.

  1. 👍
  2. 👎
  3. 👁
  1. a,3.98527

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry

    The reaction of hydrochloric acid (HCl) with ammonia (NH3) is described by the equation: HCl + NH3 → NH4Cl A student is titrating 50 mL of 0.32 M NH3 with 0.5 M HCl. How much hydrochloric acid must be added to react completely

  2. chemistry

    If 20 grams of zinc reacts with hydrochloric acid, how much zinc chloride is produced?

  3. chemistry

    Nitric acid and zinc react to form zinc nitrate, ammonium nitrate, and water. 4Zn(s) + 10HNO3(aq) → 4Zn(NO3)2(aq) + NH4NO3(aq) + 3H2O(l) A. How many atoms of zinc react with 1.49g HNO3? B. Calculate the number of grams of zinc

  4. Chemistry

    Zn+ 2HCl -> ZnCL2+h2 what volume of hydrogen at stp is produced when 2.5 of zinc react with an excess of hydrochloric acid

  1. Chemistry

    How many grams of bromine are required to react completely with 37.4 grams aluminum chloride?

  2. CHEMISTRY

    A student combusted 0.500g of purified aluminum power with excess oxygen in an oxygen atmosphere according to the reaction, 4Al(s) + 3O2(g)= 2Al2O3(s) A) What is the limiting reactant? B) How many moles of Al were used? C) How

  3. Chemistry

    How many grams of hydrochloric acid are required to react completely with 4.30 grams of zinc? I got 4.80g HCl for the answer but do not know how to do part 2 which is, How many molecules of a gas will be produced? Thanks.

  4. Chemistry

    When 0.40 g of impure zinc reacted with an excess of hydrochloric acid, 127 mL of hydrogen was collected over water at 10 degress C The external pressure was 737.7 Torr. a) What volume would the dry hydrogen occupy at 1.00 atm and

  1. chemistry

    how many grams of magnesium are required to react with 2.0 moles of hydrochloric acid?

  2. chemistry

    Hydrogen gas is produced when zinc reacts with hydrochloric acid. if the actual yeild of this reaction is 85%, how many grams of zinc are needed to produce 112L of H2 at STP?

  3. Chemistry

    How many grams of solid zinc metal will completely react with 100.0 mL of 0.0525 M HCl, if zinc chloride and hydrogen gas are the only products?

  4. chemistry

    When zinc metal is reacted with hydrochloric acid, zinc chloride and hydrogen gas are produced. If 16.4 ml of 2.14 M HCl are used: a) how many grams of zinc metal are needed to completely use up the acid? b) What will be the

You can view more similar questions or ask a new question.