K+H3PO4=

The reaction you've provided is between potassium (K) and phosphoric acid (H₃PO₄). When potassium reacts with phosphoric acid, it typically produces potassium phosphate (K₃PO₄) and hydrogen gas (H₂) as products.

The balanced chemical equation for this reaction can be expressed as:

\[ 3K + H_3PO_4 \rightarrow K_3PO_4 + \frac{3}{2}H_2 \]

However, it is common practice to write the equation using whole numbers, so we can multiply the entire equation by 2:

\[ 6K + 2H_3PO_4 \rightarrow 2K_3PO_4 + 3H_2 \]

This shows that 6 moles of potassium react with 2 moles of phosphoric acid to produce 2 moles of potassium phosphate and 3 moles of hydrogen gas.

Please remember that actual laboratory reactions may depend on conditions such as concentrations and physical states, and safety precautions should always be considered when working with reactive metals like potassium.