| Schedule of share purchase warrants |
| | | Number of warrants | | | Weighted average exercise price | | | | | | | | | | | Balance, January 1, 2018 | | | 4,237,913 | | | $ | 0.19 | | | Issued | | | 500,000 | | | | 0.12 | | | Expired | | | (838,240 | ) | | | 0.23 | | | Balance, December 31, 2018 | | | 3,899,673 | | | | 0.20 | | | Issued | | | 775,000 | | | | 0.10 | | | Expired | | | (147,059 | ) | | | 0.35 | | | Balance, December 31, 2019 | | | 4,527,614 | | | $ | 0.18 | |
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| Schedule of share purchase warrants outstanding |
| Number of warrants outstanding | | | Exercise price | | | Expiration date | | | | 500,000 | | | $ | 0.12 | | | June 1, 2020 | | | | 2,222,222 | | | $ | 0.23 | | | February 23, 2022 | | | | 775,000 | | | $ | 0.10 | | | September 23, 2024 | | | | 980,392 | | | $ | 0.15 | | | December 2, 2021 | | | | 50,000 | | | $ | 0.20 | | | January 2, 2022 | | | | 4,527,614 | | | | | | | | | |